Exemplo n.º 1
5
func main() {
	// Initialize GLFW for window management
	glfw.SetErrorCallback(glfwErrorCallback)
	if !glfw.Init() {
		panic("failed to initialize glfw")
	}
	defer glfw.Terminate()

	glfw.WindowHint(glfw.Resizable, glfw.False)
	glfw.WindowHint(glfw.ContextVersionMajor, 3)
	glfw.WindowHint(glfw.ContextVersionMinor, 3)
	glfw.WindowHint(glfw.OpenglForwardCompatible, glfw.True)    // Necessary for OS X
	glfw.WindowHint(glfw.OpenglProfile, glfw.OpenglCoreProfile) // Necessary for OS X
	glfw.WindowHint(glfw.OpenglDebugContext, glfw.True)
	window, err := glfw.CreateWindow(WindowWidth, WindowHeight, "Cube", nil, nil)
	if err != nil {
		panic(err)
	}
	window.MakeContextCurrent()

	// Initialize Glow
	if err := gl.Init(); err != nil {
		panic(err)
	}

	// Note that it is possible to use GL functions spanning multiple versions
	if err := gl4.Init(); err != nil {
		fmt.Printf("Could not initialize GL 4.4 (non-fatal)")
	}

	if gl.ARB_debug_output {
		gl.Enable(gl.DEBUG_OUTPUT_SYNCHRONOUS_ARB)
		gl.DebugMessageCallbackARB(gl.DebugProc(glDebugCallback), gl.Ptr(nil))
		// Trigger an error to demonstrate debug output
		gl.Enable(gl.CONTEXT_FLAGS)
	}

	version := gl.GoStr(gl.GetString(gl.VERSION))
	fmt.Println("OpenGL version", version)

	// Configure the vertex and fragment shaders
	program, err := newProgram(vertexShader, fragmentShader)
	if err != nil {
		panic(err)
	}
	gl.UseProgram(program)

	projection := mgl32.Perspective(70.0, float32(WindowWidth)/WindowHeight, 0.1, 10.0)
	projectionUniform := gl.GetUniformLocation(program, gl.Str("projection\x00"))
	gl.UniformMatrix4fv(projectionUniform, 1, false, &projection[0])

	camera := mgl32.LookAtV(mgl32.Vec3{3, 3, 3}, mgl32.Vec3{0, 0, 0}, mgl32.Vec3{0, 1, 0})
	cameraUniform := gl.GetUniformLocation(program, gl.Str("camera\x00"))
	gl.UniformMatrix4fv(cameraUniform, 1, false, &camera[0])

	model := mgl32.Ident4()
	modelUniform := gl.GetUniformLocation(program, gl.Str("model\x00"))
	gl.UniformMatrix4fv(modelUniform, 1, false, &model[0])

	textureUniform := gl.GetUniformLocation(program, gl.Str("tex\x00"))
	gl.Uniform1i(textureUniform, 0)

	gl.BindFragDataLocation(program, 0, gl.Str("outputColor\x00"))

	// Load the texture
	texture, err := newTexture("square.png")
	if err != nil {
		panic(err)
	}

	// Configure the vertex data
	var vao uint32
	gl.GenVertexArrays(1, &vao)
	gl.BindVertexArray(vao)

	var vbo uint32
	gl.GenBuffers(1, &vbo)
	gl.BindBuffer(gl.ARRAY_BUFFER, vbo)
	gl.BufferData(gl.ARRAY_BUFFER, len(cubeVertices)*4, gl.Ptr(cubeVertices), gl.STATIC_DRAW)

	vertAttrib := uint32(gl.GetAttribLocation(program, gl.Str("vert\x00")))
	gl.EnableVertexAttribArray(vertAttrib)
	gl.VertexAttribPointer(vertAttrib, 3, gl.FLOAT, false, 5*4, gl.PtrOffset(0))

	texCoordAttrib := uint32(gl.GetAttribLocation(program, gl.Str("vertTexCoord\x00")))
	gl.EnableVertexAttribArray(texCoordAttrib)
	gl.VertexAttribPointer(texCoordAttrib, 2, gl.FLOAT, false, 5*4, gl.PtrOffset(3*4))

	// Configure global settings
	gl.Enable(gl.DEPTH_TEST)
	gl.DepthFunc(gl.LESS)
	gl.ClearColor(1.0, 1.0, 1.0, 1.0)

	angle := 0.0
	previousTime := glfw.GetTime()

	for !window.ShouldClose() {
		gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)

		// Update
		time := glfw.GetTime()
		elapsed := time - previousTime
		previousTime = time

		angle += elapsed
		model = mgl32.HomogRotate3D(float32(angle), mgl32.Vec3{0, 1, 0})

		// Render
		gl.UseProgram(program)
		gl.UniformMatrix4fv(modelUniform, 1, false, &model[0])

		gl.BindVertexArray(vao)

		gl.ActiveTexture(gl.TEXTURE0)
		gl.BindTexture(gl.TEXTURE_2D, texture)

		gl.DrawArrays(gl.TRIANGLES, 0, 6*2*3)

		// Maintenance
		window.SwapBuffers()
		glfw.PollEvents()
	}
}
Exemplo n.º 2
0
func onStart(glctx gl.Context, sz size.Event) {
	log.Printf("creating GL program")
	var err error
	keystate = map[touch.Sequence]int{}
	program, err = glutil.CreateProgram(glctx, vertexShader, fragmentShader)
	if err != nil {
		log.Printf("error creating GL program: %v", err)
		return
	}

	glctx.Enable(gl.DEPTH_TEST)

	position = glctx.GetAttribLocation(program, "position")
	texCordIn = glctx.GetAttribLocation(program, "texCordIn")
	color = glctx.GetUniformLocation(program, "color")
	drawi = glctx.GetUniformLocation(program, "drawi")
	projection = glctx.GetUniformLocation(program, "projection")
	camera = glctx.GetUniformLocation(program, "camera")

	loadTexture(glctx)
	glctx.UseProgram(program)

	projectionMat := mgl32.Perspective(mgl32.DegToRad(75.0), float32(1), 0.5, 40.0)
	glctx.UniformMatrix4fv(projection, projectionMat[:])

	cameraMat := mgl32.LookAtV(mgl32.Vec3{0.5, 0, 1.5}, mgl32.Vec3{0, 0, 0}, mgl32.Vec3{0, 1, 0})
	glctx.UniformMatrix4fv(camera, cameraMat[:])

	board = NewBoard(glctx, float32(0.05), 10)

	numKeys := len(board.bigKeys) + len(board.smallKeys)

	InitializeSound(numKeys)
}
Exemplo n.º 3
0
func onPaint(glctx gl.Context, sz size.Event) {

	glctx.Viewport(0, 0, sz.WidthPx, sz.HeightPx)
	glctx.ClearColor(0.5, 0.5, 0.5, 1)
	glctx.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)

	glctx.UseProgram(program)

	projectionMtx = mgl32.Perspective(45, float32(width)/float32(height), 0.1, 100)

	arcBallMtx := arcball.getMtx()

	glctx.UniformMatrix4fv(projection, projectionMtx[:])

	glctx.UniformMatrix4fv(view, arcBallMtx[:])

	glctx.BindBuffer(gl.ARRAY_BUFFER, triBuf)
	glctx.EnableVertexAttribArray(position)
	glctx.EnableVertexAttribArray(color)
	glctx.EnableVertexAttribArray(normals)

	vertSize := 4 * (coordsPerVertex + colorPerVertex + normalsPerVertex)

	glctx.VertexAttribPointer(position, coordsPerVertex, gl.FLOAT, false, vertSize, 0)
	glctx.VertexAttribPointer(color, colorPerVertex, gl.FLOAT, false, vertSize, 4*coordsPerVertex)
	glctx.VertexAttribPointer(normals, normalsPerVertex, gl.FLOAT, false, vertSize, 4*(coordsPerVertex+colorPerVertex))

	glctx.DepthMask(true)

	glctx.Uniform3fv(lightPos, light.Pos[:])
	glctx.Uniform3fv(lightIntensity, light.Intensities[:])

	for _, k := range piano.Keys {
		glctx.Uniform4fv(tint, k.Color[:])

		mtx := k.GetMtx()
		normMat := mtx.Mat3().Inv().Transpose()
		glctx.UniformMatrix3fv(normalMatrix, normMat[:])
		glctx.UniformMatrix4fv(model, mtx[:])
		glctx.DrawArrays(gl.TRIANGLES, 0, len(triangleData)/vertSize)
	}

	modelMtx := mgl32.Ident4()
	modelMtx = modelMtx.Mul4(mgl32.Translate3D(worldPos.X(), worldPos.Y(), worldPos.Z()))
	modelMtx = modelMtx.Mul4(mgl32.Scale3D(0.5, 0.5, 0.5))

	/*
		glctx.Uniform4fv(tint, red[:])
		// Disable depthmask so we dont get the pixel depth of the cursor cube
		glctx.DepthMask(false)
		glctx.UniformMatrix4fv(model, modelMtx[:])
		glctx.DepthMask(true)
	*/

	glctx.DisableVertexAttribArray(position)
	glctx.DisableVertexAttribArray(color)
	glctx.DisableVertexAttribArray(normals)

	fps.Draw(sz)
}
Exemplo n.º 4
0
//
// Draw Loop Function
// This function gets called on every update.
//
func drawLoop(glw *wrapper.Glw) {
	// Sets the Clear Color (Background Color)
	gl.ClearColor(0.0, 0.0, 0.0, 1.0)

	// Clears the Window
	gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)

	// Enables Depth
	gl.Enable(gl.DEPTH_TEST)

	// Sets the Shader program to Use
	gl.UseProgram(shaderProgram)

	// Define the model transformations for the cube
	cube.ResetModel()
	cube.Translate(x+0.5, y, z)
	cube.Scale(scale, scale, scale)            //scale equally in all axis
	cube.Rotate(-angle_x, mgl32.Vec3{1, 0, 0}) //rotating in clockwise direction around x-axis
	cube.Rotate(-angle_y, mgl32.Vec3{0, 1, 0}) //rotating in clockwise direction around y-axis
	cube.Rotate(-angle_z, mgl32.Vec3{0, 0, 1}) //rotating in clockwise direction around z-axis

	// Define the model transformations for our sphere
	sphere.ResetModel()
	sphere.Translate(-x-0.5, 0, 0)
	sphere.Scale(scale/3.0, scale/3.0, scale/3.0) //scale equally in all axis
	sphere.Rotate(-angle_x, mgl32.Vec3{1, 0, 0})  //rotating in clockwise direction around x-axis
	sphere.Rotate(-angle_y, mgl32.Vec3{0, 1, 0})  //rotating in clockwise direction around y-axis
	sphere.Rotate(-angle_z, mgl32.Vec3{0, 0, 1})  //rotating in clockwise direction around z-axis

	// Projection matrix : 45° Field of View, 4:3 ratio, display range : 0.1 unit <-> 100 units
	var Projection mgl32.Mat4 = mgl32.Perspective(30.0, aspect_ratio, 0.1, 100.0)

	// Camera matrix
	var View mgl32.Mat4 = mgl32.LookAtV(
		mgl32.Vec3{0, 0, 4}, // Camera is at (0,0,4), in World Space
		mgl32.Vec3{0, 0, 0}, // and looks at the origin
		mgl32.Vec3{0, 1, 0}, // Head is up (set to 0,-1,0 to look upside-down)
	)

	// Send our uniforms variables to the currently bound shader,
	gl.Uniform1ui(colourmodeUniform, uint32(colourmode))
	gl.UniformMatrix4fv(viewUniform, 1, false, &View[0])
	gl.UniformMatrix4fv(projectionUniform, 1, false, &Projection[0])

	// Draws the Cube
	gl.UniformMatrix4fv(modelUniform, 1, false, &cube.Model[0])
	cube.Draw()

	// Draw our sphere
	gl.UniformMatrix4fv(modelUniform, 1, false, &sphere.Model[0])
	sphere.DrawSphere()

	gl.DisableVertexAttribArray(0)
	gl.UseProgram(0)

	/* Modify our animation variables */
	angle_x += angle_inc_x
	angle_y += angle_inc_y
	angle_z += angle_inc_z
}
Exemplo n.º 5
0
func renderCallback(delta float64) {
	gl.Viewport(0, 0, int32(app.Width), int32(app.Height))
	gl.ClearColor(0.196078, 0.6, 0.8, 1.0) // some pov-ray sky blue
	gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)

	// make the projection and view matrixes
	projection := mgl.Perspective(mgl.DegToRad(60.0), float32(app.Width)/float32(app.Height), 1.0, 200.0)
	view := app.CameraRotation.Mat4()
	view = view.Mul4(mgl.Translate3D(-app.CameraPos[0], -app.CameraPos[1], -app.CameraPos[2]))

	// draw the cube
	cube.Node.Draw(projection, view)

	// draw all of the bullets
	for _, bullet := range bullets {
		bullet.Node.Draw(projection, view)
	}

	// draw the backboard
	backboard.Node.Draw(projection, view)

	// draw the ground
	ground.Draw(projection, view)

	//time.Sleep(10 * time.Millisecond)
}
Exemplo n.º 6
0
// Load loads and sets up the model
func (m *Model) Load(fileName string) {

	m.loadFile(fileName)

	shader := sm.Shader{VertSrcFile: m.data.VertShaderFile, FragSrcFile: m.data.FragShaderFile, Name: fmt.Sprintf("%s:%s", m.data.VertShaderFile, m.data.FragShaderFile)}
	program, err := m.shaders.LoadProgram(shader, false)
	if err != nil {
		return
	}
	m.currentProgram = program

	gl.UseProgram(m.currentProgram)

	m.projection = mgl32.Perspective(mgl32.DegToRad(45.0), float32(windowWidth)/windowHeight, 0.1, 10.0)
	m.projectionUniform = gl.GetUniformLocation(m.currentProgram, gl.Str("projection\x00"))
	gl.UniformMatrix4fv(m.projectionUniform, 1, false, &m.projection[0])

	m.camera = mgl32.LookAtV(mgl32.Vec3{3, 3, 3}, mgl32.Vec3{0, 0, 0}, mgl32.Vec3{0, 1, 0})
	m.cameraUniform = gl.GetUniformLocation(m.currentProgram, gl.Str("camera\x00"))
	gl.UniformMatrix4fv(m.cameraUniform, 1, false, &m.camera[0])

	m.modelUniform = gl.GetUniformLocation(m.currentProgram, gl.Str("model\x00"))
	gl.UniformMatrix4fv(m.modelUniform, 1, false, &m.model[0])

	m.textureUniform = gl.GetUniformLocation(m.currentProgram, gl.Str("tex\x00"))
	gl.Uniform1i(m.textureUniform, 0)

	gl.BindFragDataLocation(m.currentProgram, 0, gl.Str("outputColor\x00"))

	// Load the texture
	m.textures.LoadTexture(m.data.TextureFile, m.data.TextureFile)

	// Configure the vertex data
	gl.GenVertexArrays(1, &m.vao)
	gl.BindVertexArray(m.vao)

	var vbo uint32
	gl.GenBuffers(1, &vbo)
	gl.BindBuffer(gl.ARRAY_BUFFER, vbo)
	gl.BufferData(gl.ARRAY_BUFFER, len(m.data.Verts)*4, gl.Ptr(m.data.Verts), gl.STATIC_DRAW)

	vertAttrib := uint32(gl.GetAttribLocation(m.currentProgram, gl.Str("vert\x00")))
	gl.EnableVertexAttribArray(vertAttrib)
	gl.VertexAttribPointer(vertAttrib, 3, gl.FLOAT, false, m.data.VertSize*4, gl.PtrOffset(0)) // 4:number of bytes in a float32

	texCoordAttrib := uint32(gl.GetAttribLocation(m.currentProgram, gl.Str("vertTexCoord\x00")))
	gl.EnableVertexAttribArray(texCoordAttrib)
	gl.VertexAttribPointer(texCoordAttrib, 2, gl.FLOAT, true, m.data.VertSize*4, gl.PtrOffset(3*4)) // 4:number of bytes in a float32

	if m.data.Indexed {
		var indices uint32
		gl.GenBuffers(1, &indices)
		gl.BindBuffer(gl.ELEMENT_ARRAY_BUFFER, indices)
		gl.BufferData(gl.ELEMENT_ARRAY_BUFFER, len(m.data.Indices)*4, gl.Ptr(m.data.Indices), gl.STATIC_DRAW)
	}

	gl.BindVertexArray(0)
}
Exemplo n.º 7
0
func SetPerspective(width, height int) {
	Projection := mathgl.Perspective(mathgl.DegToRad(45.0), float32(width/height), 0.1, 100.0)
	viewM = mathgl.LookAt(0.0, 0.0, 20.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0)
	projectionM = Projection

	gl.Disable(gl.CULL_FACE)
	gl.Enable(gl.DEPTH_TEST)

}
Exemplo n.º 8
0
func (e *Engine) Draw(c size.Event) {

	gl.Enable(gl.DEPTH_TEST)
	gl.DepthFunc(gl.LESS)

	gl.ClearColor(0.5, 0.8, 0.8, 1)
	gl.Clear(gl.COLOR_BUFFER_BIT)
	gl.Clear(gl.DEPTH_BUFFER_BIT)

	gl.UseProgram(e.shader.program)

	gl.Uniform3fv(e.shader.lightdir, []float32{0.5, 0.6, 0.7})

	m := mgl32.Perspective(1.3, float32(c.WidthPt/c.HeightPt), 0.1, 10.0)
	gl.UniformMatrix4fv(e.shader.projectionmatrix, m[:])

	eye := mgl32.Vec3{0, 0, 0.2}
	center := mgl32.Vec3{0, 0, 0}
	up := mgl32.Vec3{0, 1, 0}

	m = mgl32.LookAtV(eye, center, up)
	gl.UniformMatrix4fv(e.shader.viewmatrix, m[:])

	m = mgl32.HomogRotate3D((e.touchx/float32(c.WidthPt)-0.5)*6.28, mgl32.Vec3{0, 1, 0})
	gl.UniformMatrix4fv(e.shader.modelmatrix, m[:])

	m = mgl32.HomogRotate3D((e.touchx/float32(c.WidthPt)-0.5)*6.28, mgl32.Vec3{0, -1, 0})
	gl.UniformMatrix4fv(e.shader.lightmatrix, m[:])

	coordsPerVertex := 3
	for _, obj := range e.shape.Objs {
		gl.BindBuffer(gl.ARRAY_BUFFER, obj.coord)
		gl.EnableVertexAttribArray(e.shader.vertCoord)
		gl.VertexAttribPointer(e.shader.vertCoord, coordsPerVertex, gl.FLOAT, false, 12, 0)

		texCoordsPerVertex := 2
		gl.BindBuffer(gl.ARRAY_BUFFER, obj.uvcoord)
		gl.EnableVertexAttribArray(e.shader.texcoord)
		gl.VertexAttribPointer(e.shader.texcoord, texCoordsPerVertex, gl.FLOAT, false, 8, 0)

		gl.BindBuffer(gl.ARRAY_BUFFER, obj.normal)
		gl.EnableVertexAttribArray(e.shader.normal)
		gl.VertexAttribPointer(e.shader.normal, 3, gl.FLOAT, false, 12, 0)

		gl.BindTexture(gl.TEXTURE_2D, obj.tex)

		gl.DrawArrays(gl.TRIANGLES, 0, obj.vcount)

		gl.DisableVertexAttribArray(e.shader.texcoord)
		gl.DisableVertexAttribArray(e.shader.normal)
		gl.DisableVertexAttribArray(e.shader.vertCoord)
	}

	debug.DrawFPS(c)
}
Exemplo n.º 9
0
func (e *Engine) Draw(c size.Event) {

	gl.Enable(gl.DEPTH_TEST)
	gl.DepthFunc(gl.LESS)

	gl.ClearColor(0.2, 0.2, 0.2, 1)
	gl.Clear(gl.COLOR_BUFFER_BIT)
	gl.Clear(gl.DEPTH_BUFFER_BIT)

	gl.UseProgram(e.shader.program)

	m := mgl32.Perspective(0.785, float32(c.WidthPt/c.HeightPt), 0.1, 10.0)
	gl.UniformMatrix4fv(e.shader.projection, m[:])

	eye := mgl32.Vec3{0, 0, 8}
	center := mgl32.Vec3{0, 0, 0}
	up := mgl32.Vec3{0, 1, 0}

	m = mgl32.LookAtV(eye, center, up)
	gl.UniformMatrix4fv(e.shader.view, m[:])

	m = mgl32.HomogRotate3D(float32(e.touchLoc.X/c.WidthPt-0.5)*3.14*2, mgl32.Vec3{0, 1, 0})
	gl.UniformMatrix4fv(e.shader.modelx, m[:])

	m = mgl32.HomogRotate3D(float32(e.touchLoc.Y/c.HeightPt-0.5)*3.14, mgl32.Vec3{1, 0, 0})
	gl.UniformMatrix4fv(e.shader.modely, m[:])

	coordsPerVertex := 3
	for _, obj := range e.shape.Objs {
		gl.BindBuffer(gl.ARRAY_BUFFER, obj.coord)
		gl.EnableVertexAttribArray(e.shader.vertCoord)

		gl.VertexAttribPointer(e.shader.vertCoord, coordsPerVertex, gl.FLOAT, false, 12, 0)

		if obj.useuv == true {
			gl.Uniform1i(e.shader.useuv, 1)
			texCoordsPerVertex := 2
			gl.BindBuffer(gl.ARRAY_BUFFER, obj.uvcoord)
			gl.EnableVertexAttribArray(e.shader.vertTexCoord)
			gl.VertexAttribPointer(e.shader.vertTexCoord, texCoordsPerVertex, gl.FLOAT, false, 8, 0)

			gl.BindTexture(gl.TEXTURE_2D, obj.tex)
		} else {
			gl.Uniform1i(e.shader.useuv, 0)
			gl.Uniform4f(e.shader.color, obj.color[0], obj.color[1], obj.color[2], obj.color[3])
		}
		gl.DrawArrays(gl.TRIANGLES, 0, obj.vcount)
		if obj.useuv {
			gl.DisableVertexAttribArray(e.shader.vertTexCoord)
		}
		gl.DisableVertexAttribArray(e.shader.vertCoord)
	}

	debug.DrawFPS(c)
}
Exemplo n.º 10
0
//TestLoop is a method that initiate the game
func EngineLoop(window *glfw.Window) {
	mat := mgl32.Perspective(mgl32.DegToRad(45.0), float32(graphics.WIDTH)/graphics.HEIGHT, 0.1, 100.0).Mul4(mgl32.Translate3D(0.0, 0.0, -5.0))

	shader, err := mvcShader.CreateMVCShader()
	if err != nil {
		panic(err)
	}
	mesh := cubeMesh.CreateVertexArray()
	newEngine := Engine{mat: mat, shader: shader.BlankShader, mesh: mesh, BaseEngine: BaseEngine{run: true, window: window}}
	mesh.SetPos(newEngine.shader)
	newEngine.loop(&newEngine)

}
Exemplo n.º 11
0
func (me *test) Display(c *Core) {
	me.o1.Draw(c)
	me.o2.Draw(c)

	projection := mgl32.Perspective(mgl32.DegToRad(Fov), float32(WindowWidth)/WindowHeight, Near, Far)
	view := mgl32.LookAtV(mgl32.Vec3{3, 3, 3}, mgl32.Vec3{0, 0, 0}, mgl32.Vec3{0, 1, 0})
	model := mgl32.Ident4()
	MVP := projection.Mul4(view).Mul4(model)

	gl.UniformMatrix4fv(mvpLoc, 1, false, &MVP[0])
	gl.Uniform1i(TexLoc, 0)

}
Exemplo n.º 12
0
func (c *Camera) GetMouseVector(windowSize mgl32.Vec2, mouse mgl32.Vec2) mgl32.Vec3 {
	v, err := mgl32.UnProject(
		mgl32.Vec3{mouse.X(), windowSize.Y() - mouse.Y(), 0.5},
		mgl32.LookAtV(c.Translation, c.Lookat, c.Up),
		mgl32.Perspective(mgl32.DegToRad(c.Angle), windowSize.X()/windowSize.Y(), c.Near, c.Far),
		0, 0, int(windowSize.X()), int(windowSize.Y()),
	)
	if err == nil {
		return v.Sub(c.Translation).Normalize()
	} else {
		log.Println("Error converting camera vector: ", err)
	}
	return c.Lookat
}
Exemplo n.º 13
0
func (e *Engine) Draw(c size.Event) {
	since := time.Now().Sub(e.started)
	//gl.Enable()

	gl.Enable(gl.DEPTH_TEST)
	gl.DepthFunc(gl.LESS)

	gl.ClearColor(0, 0, 0, 1)
	gl.Clear(gl.COLOR_BUFFER_BIT)
	gl.Clear(gl.DEPTH_BUFFER_BIT)

	gl.UseProgram(e.shader.program)

	m := mgl32.Perspective(0.785, float32(c.WidthPt/c.HeightPt), 0.1, 10.0)
	gl.UniformMatrix4fv(e.shader.projection, m[:])

	eye := mgl32.Vec3{3, 3, 3}
	center := mgl32.Vec3{0, 0, 0}
	up := mgl32.Vec3{0, 1, 0}

	m = mgl32.LookAtV(eye, center, up)
	gl.UniformMatrix4fv(e.shader.view, m[:])

	m = mgl32.HomogRotate3D(float32(since.Seconds()), mgl32.Vec3{0, 1, 0})
	gl.UniformMatrix4fv(e.shader.model, m[:])

	gl.BindBuffer(gl.ARRAY_BUFFER, e.shape.buf)

	coordsPerVertex := 3
	texCoordsPerVertex := 2
	vertexCount := len(cubeData) / (coordsPerVertex + texCoordsPerVertex)

	gl.EnableVertexAttribArray(e.shader.vertCoord)
	gl.VertexAttribPointer(e.shader.vertCoord, coordsPerVertex, gl.FLOAT, false, 20, 0) // 4 bytes in float, 5 values per vertex

	gl.EnableVertexAttribArray(e.shader.vertTexCoord)
	gl.VertexAttribPointer(e.shader.vertTexCoord, texCoordsPerVertex, gl.FLOAT, false, 20, 12)

	gl.BindTexture(gl.TEXTURE_2D, e.shape.texture)

	gl.DrawArrays(gl.TRIANGLES, 0, vertexCount)

	gl.DisableVertexAttribArray(e.shader.vertCoord)

	debug.DrawFPS(c)
}
Exemplo n.º 14
0
func (e *Engine) Draw(c event.Config) {
	since := time.Now().Sub(e.started)

	gl.Enable(gl.DEPTH_TEST)
	gl.DepthFunc(gl.LESS)

	gl.ClearColor(0, 0, 0, 1)
	gl.Clear(gl.COLOR_BUFFER_BIT)
	gl.Clear(gl.DEPTH_BUFFER_BIT)

	gl.UseProgram(e.shader.program)

	// Setup MVP
	var m mgl.Mat4
	m = mgl.Perspective(0.785, float32(c.Width/c.Height), 0.1, 10.0)
	gl.UniformMatrix4fv(e.shader.projection, m[:])

	m = mgl.LookAtV(
		mgl.Vec3{3, 3, 3}, // eye
		mgl.Vec3{0, 0, 0}, // center
		mgl.Vec3{0, 1, 0}, // up
	)
	gl.UniformMatrix4fv(e.shader.view, m[:])

	m = mgl.HomogRotate3D(float32(since.Seconds()), mgl.Vec3{0, 1, 0})
	gl.UniformMatrix4fv(e.shader.model, m[:])

	// Draw our shape
	gl.BindBuffer(gl.ARRAY_BUFFER, e.shape.buf)

	gl.EnableVertexAttribArray(e.shader.vertCoord)
	gl.VertexAttribPointer(e.shader.vertCoord, e.shape.coordsPerVertex, gl.FLOAT, false, 20, 0) // 4 bytes in float, 5 values per vertex

	gl.EnableVertexAttribArray(e.shader.vertTexCoord)
	gl.VertexAttribPointer(e.shader.vertTexCoord, e.shape.texCoordsPerVertex, gl.FLOAT, false, 20, 12)

	gl.ActiveTexture(gl.TEXTURE0)
	gl.BindTexture(gl.TEXTURE_2D, e.shape.texture)

	gl.DrawArrays(gl.TRIANGLES, 0, e.shape.vertexCount)

	gl.DisableVertexAttribArray(e.shader.vertCoord)

	//debug.DrawFPS(c)
}
Exemplo n.º 15
0
func CreateCamera(x, y, z, width, height, fov, near, far float32) *Camera {
	cam := &Camera{
		Transform:  CreateTransform(x, y, z),
		Width:      width,
		Height:     height,
		Ratio:      float32(width) / float32(height),
		Fov:        fov,
		Near:       near,
		Far:        far,
		Projection: mgl.Perspective(mgl.DegToRad(fov), width/height, near, far),
		//Projection: mgl.Ortho(-width/2,width/2,-height/2,height/2,-100,100),
	}

	/* do an initial update at t=0 to initialize vectors */
	cam.Update(0.0)

	return cam
}
Exemplo n.º 16
0
func (e *Engine) Draw(c size.Event) {

	gl.Enable(gl.DEPTH_TEST)
	gl.DepthFunc(gl.LESS)

	gl.ClearColor(0, 0, 0, 1)
	gl.Clear(gl.COLOR_BUFFER_BIT)
	gl.Clear(gl.DEPTH_BUFFER_BIT)

	gl.UseProgram(e.shader.program)

	m := mgl32.Perspective(0.785, float32(c.WidthPt/c.HeightPt), 0.1, 10.0)
	gl.UniformMatrix4fv(e.shader.projection, m[:])

	eye := mgl32.Vec3{0, 3, 3}
	center := mgl32.Vec3{0, 0, 0}
	up := mgl32.Vec3{0, 1, 0}

	m = mgl32.LookAtV(eye, center, up)
	gl.UniformMatrix4fv(e.shader.view, m[:])

	m = mgl32.HomogRotate3D(float32(e.touchLocX*5/c.WidthPt), mgl32.Vec3{0, 1, 0})
	gl.UniformMatrix4fv(e.shader.modelx, m[:])

	m = mgl32.HomogRotate3D(float32(e.touchLocY*5/c.HeightPt), mgl32.Vec3{1, 0, 0})
	gl.UniformMatrix4fv(e.shader.modely, m[:])

	gl.BindBuffer(gl.ARRAY_BUFFER, e.shape.buf)
	gl.EnableVertexAttribArray(e.shader.vertCoord)
	gl.VertexAttribPointer(e.shader.vertCoord, coordsPerVertex, gl.FLOAT, false, 0, 0)

	gl.BindBuffer(gl.ARRAY_BUFFER, e.shape.colorbuf)
	gl.EnableVertexAttribArray(e.shader.color)
	gl.VertexAttribPointer(e.shader.color, colorsPerVertex, gl.FLOAT, false, 0, 0) //更新color值

	gl.DrawArrays(gl.TRIANGLES, 0, vertexCount)

	gl.DisableVertexAttribArray(e.shader.vertCoord)
	gl.DisableVertexAttribArray(e.shader.color)

	debug.DrawFPS(c)
}
Exemplo n.º 17
0
func (e *Engine) Draw(c size.Event) {

	gl.Enable(gl.DEPTH_TEST)
	gl.DepthFunc(gl.LESS)

	gl.ClearColor(0.2, 0.2, 0.2, 1)
	gl.Clear(gl.COLOR_BUFFER_BIT)
	gl.Clear(gl.DEPTH_BUFFER_BIT)

	gl.UseProgram(e.shader.program)

	m := mgl32.Perspective(0.785, float32(c.WidthPt/c.HeightPt), 0.1, 10.0)
	gl.UniformMatrix4fv(e.shader.projection, m[:])

	eye := mgl32.Vec3{0, 0, 5}
	center := mgl32.Vec3{0, 0, 0}
	up := mgl32.Vec3{0, 1, 0}

	m = mgl32.LookAtV(eye, center, up)
	gl.UniformMatrix4fv(e.shader.view, m[:])

	m = mgl32.HomogRotate3D(float32(e.touchLoc.X*10/c.WidthPt), mgl32.Vec3{0, 1, 0})
	gl.UniformMatrix4fv(e.shader.modelx, m[:])

	m = mgl32.HomogRotate3D(float32(e.touchLoc.Y*10/c.HeightPt), mgl32.Vec3{1, 0, 0})
	gl.UniformMatrix4fv(e.shader.modely, m[:])

	coordsPerVertex := 3
	for _, buf := range e.shape.bufs {
		gl.BindBuffer(gl.ARRAY_BUFFER, buf.coord)
		gl.EnableVertexAttribArray(e.shader.vertCoord)
		gl.VertexAttribPointer(e.shader.vertCoord, coordsPerVertex, gl.FLOAT, false, 0, 0)
		gl.Uniform4f(e.shader.color, buf.color[0], buf.color[1], buf.color[2], buf.color[3])
		gl.DrawArrays(gl.TRIANGLES, 0, buf.vcount)

		gl.DisableVertexAttribArray(e.shader.vertCoord)
	}

	debug.DrawFPS(c)
}
Exemplo n.º 18
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func Loop() bool {
	if !llgl.EventLoop() {
		return false
	}

	ratio := llgl.ResizeViewport()
	if ratio != 0 {
		state.projection = mgl.Perspective(mgl.DegToRad(45.0), ratio, 0.1, 10.0)
		glstate.projectionUL.SetMat4(state.projection)
	}

	state.angle += 0.001
	state.model = mgl.HomogRotate3D(float32(state.angle), mgl.Vec3{1, 0, 0})
	glstate.modelUL.SetMat4(state.model)

	llgl.Clear()
	for i := 0; i < 1*10; i++ {
		llgl.DrawTriangleArray(0, int32(len(state.data)/5))
	}

	fpsCounter.TickAndLog()
	llgl.SwapBuffers()
	return true
}
Exemplo n.º 19
0
func programLoop(window *win.Window) error {

	// the linked shader program determines how the data will be rendered
	vertShader, err := gfx.NewShaderFromFile("shaders/phong.vert", gl.VERTEX_SHADER)
	if err != nil {
		return err
	}

	fragShader, err := gfx.NewShaderFromFile("shaders/phong.frag", gl.FRAGMENT_SHADER)
	if err != nil {
		return err
	}

	program, err := gfx.NewProgram(vertShader, fragShader)
	if err != nil {
		return err
	}
	defer program.Delete()

	lightFragShader, err := gfx.NewShaderFromFile("shaders/light.frag", gl.FRAGMENT_SHADER)
	if err != nil {
		return err
	}

	// special shader program so that lights themselves are not affected by lighting
	lightProgram, err := gfx.NewProgram(vertShader, lightFragShader)
	if err != nil {
		return err
	}

	VAO := createVAO(cubeVertices, nil)
	lightVAO := createVAO(cubeVertices, nil)

	// ensure that triangles that are "behind" others do not draw over top of them
	gl.Enable(gl.DEPTH_TEST)

	camera := cam.NewFpsCamera(mgl32.Vec3{0, 0, 3}, mgl32.Vec3{0, 1, 0}, -90, 0, window.InputManager())

	for !window.ShouldClose() {

		// swaps in last buffer, polls for window events, and generally sets up for a new render frame
		window.StartFrame()

		// update camera position and direction from input evevnts
		camera.Update(window.SinceLastFrame())

		// background color
		gl.ClearColor(0, 0, 0, 1.0)
		gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT) // depth buffer needed for DEPTH_TEST

		// cube rotation matrices
		rotateX := (mgl32.Rotate3DX(mgl32.DegToRad(-45 * float32(glfw.GetTime()))))
		rotateY := (mgl32.Rotate3DY(mgl32.DegToRad(-45 * float32(glfw.GetTime()))))
		rotateZ := (mgl32.Rotate3DZ(mgl32.DegToRad(-45 * float32(glfw.GetTime()))))

		// creates perspective
		fov := float32(60.0)
		projectTransform := mgl32.Perspective(mgl32.DegToRad(fov),
			float32(window.Width())/float32(window.Height()),
			0.1,
			100.0)

		camTransform := camera.GetTransform()
		lightPos := mgl32.Vec3{0.6, 1, 0.1}
		lightTransform := mgl32.Translate3D(lightPos.X(), lightPos.Y(), lightPos.Z()).Mul4(
			mgl32.Scale3D(0.2, 0.2, 0.2))

		program.Use()
		gl.UniformMatrix4fv(program.GetUniformLocation("view"), 1, false, &camTransform[0])
		gl.UniformMatrix4fv(program.GetUniformLocation("project"), 1, false,
			&projectTransform[0])

		gl.BindVertexArray(VAO)

		// draw each cube after all coordinate system transforms are bound

		// obj is colored, light is white
		gl.Uniform3f(program.GetUniformLocation("material.ambient"), 1.0, 0.5, 0.31)
		gl.Uniform3f(program.GetUniformLocation("material.diffuse"), 1.0, 0.5, 0.31)
		gl.Uniform3f(program.GetUniformLocation("material.specular"), 0.5, 0.5, 0.5)
		gl.Uniform1f(program.GetUniformLocation("material.shininess"), 32.0)

		lightColor := mgl32.Vec3{
			float32(math.Sin(glfw.GetTime() * 1)),
			float32(math.Sin(glfw.GetTime() * 0.35)),
			float32(math.Sin(glfw.GetTime() * 0.65)),
		}

		diffuseColor := mgl32.Vec3{
			0.5 * lightColor[0],
			0.5 * lightColor[1],
			0.5 * lightColor[2],
		}
		ambientColor := mgl32.Vec3{
			0.2 * lightColor[0],
			0.2 * lightColor[1],
			0.2 * lightColor[2],
		}

		gl.Uniform3f(program.GetUniformLocation("light.ambient"),
			ambientColor[0], ambientColor[1], ambientColor[2])
		gl.Uniform3f(program.GetUniformLocation("light.diffuse"),
			diffuseColor[0], diffuseColor[1], diffuseColor[2])
		gl.Uniform3f(program.GetUniformLocation("light.specular"), 1.0, 1.0, 1.0)
		gl.Uniform3f(program.GetUniformLocation("light.position"), lightPos.X(), lightPos.Y(), lightPos.Z())

		for _, pos := range cubePositions {

			// turn the cubes into rectangular prisms for more fun
			worldTranslate := mgl32.Translate3D(pos[0], pos[1], pos[2])
			worldTransform := worldTranslate.Mul4(
				rotateX.Mul3(rotateY).Mul3(rotateZ).Mat4(),
			)

			gl.UniformMatrix4fv(program.GetUniformLocation("model"), 1, false,
				&worldTransform[0])

			gl.DrawArrays(gl.TRIANGLES, 0, 36)
		}
		gl.BindVertexArray(0)

		// Draw the light obj after the other boxes using its separate shader program
		// this means that we must re-bind any uniforms
		lightProgram.Use()
		gl.BindVertexArray(lightVAO)
		gl.UniformMatrix4fv(lightProgram.GetUniformLocation("model"), 1, false, &lightTransform[0])
		gl.UniformMatrix4fv(lightProgram.GetUniformLocation("view"), 1, false, &camTransform[0])
		gl.UniformMatrix4fv(lightProgram.GetUniformLocation("project"), 1, false, &projectTransform[0])
		gl.DrawArrays(gl.TRIANGLES, 0, 36)

		gl.BindVertexArray(0)

		// end of draw loop
	}

	return nil
}
Exemplo n.º 20
0
// Draw draws a single frame
func Draw(width, height int, delta float64) {
	tickAnimatedTextures(delta)
	frameID++
sync:
	for {
		select {
		case f := <-syncChan:
			f()
		default:
			break sync
		}
	}

	// Only update the viewport if the window was resized
	if lastHeight != height || lastWidth != width || lastFOV != FOV.Value() {
		lastWidth = width
		lastHeight = height
		lastFOV = FOV.Value()

		perspectiveMatrix = mgl32.Perspective(
			(math.Pi/180)*float32(lastFOV),
			float32(width)/float32(height),
			0.1,
			500.0,
		)
		gl.Viewport(0, 0, width, height)
		frustum.SetPerspective(
			(math.Pi/180)*float32(lastFOV),
			float32(width)/float32(height),
			0.1,
			500.0,
		)
		initTrans()
	}

	mainFramebuffer.Bind()
	gl.Enable(gl.Multisample)

	gl.ActiveTexture(0)
	glTexture.Bind(gl.Texture2DArray)

	gl.ClearColor(ClearColour.R, ClearColour.G, ClearColour.B, 1.0)
	gl.Clear(gl.ColorBufferBit | gl.DepthBufferBit)

	chunkProgram.Use()

	viewVector = mgl32.Vec3{
		float32(math.Cos(Camera.Yaw-math.Pi/2) * -math.Cos(Camera.Pitch)),
		float32(-math.Sin(Camera.Pitch)),
		float32(-math.Sin(Camera.Yaw-math.Pi/2) * -math.Cos(Camera.Pitch)),
	}
	cam := mgl32.Vec3{-float32(Camera.X), -float32(Camera.Y), float32(Camera.Z)}
	cameraMatrix = mgl32.LookAtV(
		cam,
		cam.Add(mgl32.Vec3{-viewVector.X(), -viewVector.Y(), viewVector.Z()}),
		mgl32.Vec3{0, -1, 0},
	)
	cameraMatrix = cameraMatrix.Mul4(mgl32.Scale3D(-1.0, 1.0, 1.0))

	frustum.SetCamera(
		cam,
		cam.Add(mgl32.Vec3{-viewVector.X(), -viewVector.Y(), viewVector.Z()}),
		mgl32.Vec3{0, -1, 0},
	)

	shaderChunk.PerspectiveMatrix.Matrix4(&perspectiveMatrix)
	shaderChunk.CameraMatrix.Matrix4(&cameraMatrix)
	shaderChunk.Texture.Int(0)
	shaderChunk.LightLevel.Float(LightLevel)
	shaderChunk.SkyOffset.Float(SkyOffset)

	chunkPos := position{
		X: int(Camera.X) >> 4,
		Y: int(Camera.Y) >> 4,
		Z: int(Camera.Z) >> 4,
	}
	nearestBuffer = buffers[chunkPos]

	for _, dir := range direction.Values {
		validDirs[dir] = viewVector.Dot(dir.AsVec()) > -0.8
	}

	renderOrder = renderOrder[:0]
	renderBuffer(nearestBuffer, chunkPos, direction.Invalid, delta)

	drawLines()
	drawModels()
	clouds.tick(delta)

	chunkProgramT.Use()
	shaderChunkT.PerspectiveMatrix.Matrix4(&perspectiveMatrix)
	shaderChunkT.CameraMatrix.Matrix4(&cameraMatrix)
	shaderChunkT.Texture.Int(0)
	shaderChunkT.LightLevel.Float(LightLevel)
	shaderChunkT.SkyOffset.Float(SkyOffset)

	// Copy the depth buffer
	mainFramebuffer.BindRead()
	transFramebuffer.BindDraw()
	gl.BlitFramebuffer(
		0, 0, lastWidth, lastHeight,
		0, 0, lastWidth, lastHeight,
		gl.DepthBufferBit, gl.Nearest,
	)

	gl.Enable(gl.Blend)
	gl.DepthMask(false)
	transFramebuffer.Bind()
	gl.ClearColor(0, 0, 0, 1)
	gl.Clear(gl.ColorBufferBit)
	gl.ClearBuffer(gl.Color, 0, []float32{0, 0, 0, 1})
	gl.ClearBuffer(gl.Color, 1, []float32{0, 0, 0, 0})
	gl.BlendFuncSeparate(gl.OneFactor, gl.OneFactor, gl.ZeroFactor, gl.OneMinusSrcAlpha)
	for _, chunk := range renderOrder {
		if chunk.countT > 0 && chunk.bufferT.IsValid() {
			shaderChunkT.Offset.Int3(chunk.X, chunk.Y*4096-chunk.Y*int(4096*(1-chunk.progress)), chunk.Z)

			chunk.arrayT.Bind()
			gl.DrawElements(gl.Triangles, chunk.countT, elementBufferType, 0)
		}
	}

	gl.UnbindFramebuffer()
	gl.Disable(gl.DepthTest)
	gl.Clear(gl.ColorBufferBit)
	gl.Disable(gl.Blend)

	transDraw()

	gl.Enable(gl.DepthTest)
	gl.DepthMask(true)
	gl.BlendFunc(gl.SrcAlpha, gl.OneMinusSrcAlpha)
	gl.Disable(gl.Multisample)

	drawUI()

	if debugFramebuffers.Value() {
		gl.Enable(gl.Multisample)
		blitBuffers()
		gl.Disable(gl.Multisample)
	}
}
Exemplo n.º 21
0
func programLoop(window *win.Window) error {

	// the linked shader program determines how the data will be rendered
	vertShader, err := gfx.NewShaderFromFile("shaders/basic.vert", gl.VERTEX_SHADER)
	if err != nil {
		return err
	}

	fragShader, err := gfx.NewShaderFromFile("shaders/basic.frag", gl.FRAGMENT_SHADER)
	if err != nil {
		return err
	}

	program, err := gfx.NewProgram(vertShader, fragShader)
	if err != nil {
		return err
	}
	defer program.Delete()

	VAO := createVAO(cubeVertices, nil)
	texture0, err := gfx.NewTextureFromFile("../images/RTS_Crate.png",
		gl.CLAMP_TO_EDGE, gl.CLAMP_TO_EDGE)
	if err != nil {
		panic(err.Error())
	}

	texture1, err := gfx.NewTextureFromFile("../images/trollface-transparent.png",
		gl.CLAMP_TO_EDGE, gl.CLAMP_TO_EDGE)
	if err != nil {
		panic(err.Error())
	}

	// ensure that triangles that are "behind" others do not draw over top of them
	gl.Enable(gl.DEPTH_TEST)

	camera := cam.NewFpsCamera(mgl32.Vec3{0, 0, 3}, mgl32.Vec3{0, 1, 0}, -90, 0, window.InputManager())

	for !window.ShouldClose() {

		// swaps in last buffer, polls for window events, and generally sets up for a new render frame
		window.StartFrame()

		// update camera position and direction from input evevnts
		camera.Update(window.SinceLastFrame())

		// background color
		gl.ClearColor(0.2, 0.5, 0.5, 1.0)
		gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT) // depth buffer needed for DEPTH_TEST

		program.Use()

		// bind textures
		texture0.Bind(gl.TEXTURE0)
		texture0.SetUniform(program.GetUniformLocation("ourTexture0"))

		texture1.Bind(gl.TEXTURE1)
		texture1.SetUniform(program.GetUniformLocation("ourTexture1"))

		// cube rotation matrices
		rotateX := (mgl32.Rotate3DX(mgl32.DegToRad(-60 * float32(glfw.GetTime()))))
		rotateY := (mgl32.Rotate3DY(mgl32.DegToRad(-60 * float32(glfw.GetTime()))))
		rotateZ := (mgl32.Rotate3DZ(mgl32.DegToRad(-60 * float32(glfw.GetTime()))))

		// creates perspective
		fov := float32(60.0)
		projectTransform := mgl32.Perspective(mgl32.DegToRad(fov),
			float32(window.Width())/float32(window.Height()),
			0.1,
			100.0)

		camTransform := camera.GetTransform()
		gl.UniformMatrix4fv(program.GetUniformLocation("camera"), 1, false, &camTransform[0])
		gl.UniformMatrix4fv(program.GetUniformLocation("project"), 1, false,
			&projectTransform[0])

		gl.BindVertexArray(VAO)

		// draw each cube after all coordinate system transforms are bound
		for _, pos := range cubePositions {
			worldTranslate := mgl32.Translate3D(pos[0], pos[1], pos[2])
			worldTransform := (worldTranslate.Mul4(rotateX.Mul3(rotateY).Mul3(rotateZ).Mat4()))

			gl.UniformMatrix4fv(program.GetUniformLocation("world"), 1, false,
				&worldTransform[0])

			gl.DrawArrays(gl.TRIANGLES, 0, 36)
		}

		gl.BindVertexArray(0)

		texture0.UnBind()
		texture1.UnBind()

		// end of draw loop
	}

	return nil
}
Exemplo n.º 22
0
// Since go has multiple return values, I just went ahead and made it return the view and perspective matrices (in that order) rather than messing with getter methods
func (c *Camera) ComputeViewPerspective() (mgl32.Mat4, mgl32.Mat4) {
	if mgl64.FloatEqual(-1.0, c.time) {
		c.time = glfw.GetTime()
	}

	currTime := glfw.GetTime()
	deltaT := currTime - c.time

	xPos, yPos := c.window.GetCursorPosition()
	c.window.SetCursorPosition(width/2.0, height/2.0)

	c.hAngle += mouseSpeed * ((width / 2.0) - float64(xPos))
	c.vAngle += mouseSpeed * ((height / 2.0) - float64(yPos))

	dir := mgl32.Vec3{
		float32(math.Cos(c.vAngle) * math.Sin(c.hAngle)),
		float32(math.Sin(c.vAngle)),
		float32(math.Cos(c.vAngle) * math.Cos(c.hAngle))}

	right := mgl32.Vec3{
		float32(math.Sin(c.hAngle - math.Pi/2.0)),
		0.0,
		float32(math.Cos(c.hAngle - math.Pi/2.0))}

	up := right.Cross(dir)

	if c.window.GetKey(glfw.KeyUp) == glfw.Press || c.window.GetKey('W') == glfw.Press {
		c.pos = c.pos.Add(dir.Mul(float32(deltaT * speed)))
	}

	if c.window.GetKey(glfw.KeyDown) == glfw.Press || c.window.GetKey('S') == glfw.Press {
		c.pos = c.pos.Sub(dir.Mul(float32(deltaT * speed)))
	}

	if c.window.GetKey(glfw.KeyRight) == glfw.Press || c.window.GetKey('D') == glfw.Press {
		c.pos = c.pos.Add(right.Mul(float32(deltaT * speed)))
	}

	if c.window.GetKey(glfw.KeyLeft) == glfw.Press || c.window.GetKey('A') == glfw.Press {
		c.pos = c.pos.Sub(right.Mul(float32(deltaT * speed)))
	}

	// Adding to the original tutorial, Space goes up
	if c.window.GetKey(glfw.KeySpace) == glfw.Press {
		c.pos = c.pos.Add(up.Mul(float32(deltaT * speed)))
	}

	// Adding to the original tutorial, left control goes down
	if c.window.GetKey(glfw.KeyLeftControl) == glfw.Press {
		c.pos = c.pos.Sub(up.Mul(float32(deltaT * speed)))
	}

	fov := initialFOV //- 5.0*float64(glfw.MouseWheel())

	proj := mgl32.Perspective(float32(fov), 4.0/3.0, 0.1, 100.0)
	view := mgl32.LookAtV(c.pos, c.pos.Add(dir), up)

	c.time = currTime

	return view, proj
}
Exemplo n.º 23
0
func main() {
	runtime.LockOSThread()

	if !glfw.Init() {
		fmt.Fprintf(os.Stderr, "Can't open GLFW")
		return
	}
	defer glfw.Terminate()

	glfw.WindowHint(glfw.Samples, 4)
	glfw.WindowHint(glfw.ContextVersionMajor, 3)
	glfw.WindowHint(glfw.ContextVersionMinor, 3)
	glfw.WindowHint(glfw.OpenglProfile, glfw.OpenglCoreProfile)
	glfw.WindowHint(glfw.OpenglForwardCompatible, glfw.True) // needed for macs

	window, err := glfw.CreateWindow(1024, 768, "Tutorial 3", nil, nil)
	if err != nil {
		fmt.Fprintf(os.Stderr, "%v\n", err)
		return
	}

	window.MakeContextCurrent()

	gl.Init()
	gl.GetError() // Ignore error
	window.SetInputMode(glfw.StickyKeys, 1)

	gl.ClearColor(0., 0., 0.4, 0.)

	vertexArray := gl.GenVertexArray()
	defer vertexArray.Delete()
	vertexArray.Bind()

	prog := helper.MakeProgram("SimpleTransform.vertexshader", "SingleColor.fragmentshader")
	defer prog.Delete()

	matrixID := prog.GetUniformLocation("MVP")

	Projection := mgl32.Perspective(45.0, 4.0/3.0, 0.1, 100.0)
	//Projection := mathgl.Identity(4,mathgl.FLOAT64)
	//Projection := mathgl.Ortho2D(-5,5,-5,5)
	View := mgl32.LookAt(4.0, 3.0, 3.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0)
	//View := mathgl.Identity(4,mathgl.FLOAT64)

	Model := mgl32.Ident4()
	//Model := mathgl.Scale3D(2.,2.,2.).Mul(mathgl.HomogRotate3DX(25.0)).Mul(mathgl.Translate3D(.5,.2,-.7))
	MVP := Projection.Mul4(View).Mul4(Model) // Remember, transform multiplication order is "backwards"

	vBufferData := [...]float32{
		-1., -1., 0.,
		1., -1., 0.,
		0., 1., 0.}
	//elBufferData := [...]uint8{0, 1, 2} // Not sure why this is here

	buffer := gl.GenBuffer()
	defer buffer.Delete()
	buffer.Bind(gl.ARRAY_BUFFER)
	gl.BufferData(gl.ARRAY_BUFFER, len(vBufferData)*4, &vBufferData, gl.STATIC_DRAW)

	// Equivalent to a do... while
	for ok := true; ok; ok = (window.GetKey(glfw.KeyEscape) != glfw.Press && !window.ShouldClose()) {
		gl.Clear(gl.COLOR_BUFFER_BIT)

		prog.Use()

		matrixID.UniformMatrix4fv(false, MVP)

		attribLoc := gl.AttribLocation(0)
		attribLoc.EnableArray()
		buffer.Bind(gl.ARRAY_BUFFER)
		attribLoc.AttribPointer(3, gl.FLOAT, false, 0, nil)

		gl.DrawArrays(gl.TRIANGLES, 0, 3)

		attribLoc.DisableArray()

		window.SwapBuffers()
		glfw.PollEvents()
	}

}
Exemplo n.º 24
0
func programLoop(window *glfw.Window) error {

	// the linked shader program determines how the data will be rendered
	vertShader, err := gfx.NewShaderFromFile("shaders/basic.vert", gl.VERTEX_SHADER)
	if err != nil {
		return err
	}

	fragShader, err := gfx.NewShaderFromFile("shaders/basic.frag", gl.FRAGMENT_SHADER)
	if err != nil {
		return err
	}

	program, err := gfx.NewProgram(vertShader, fragShader)
	if err != nil {
		return err
	}
	defer program.Delete()

	vertices := []float32{
		// position        // texture position
		-0.5, -0.5, -0.5, 0.0, 0.0,
		0.5, -0.5, -0.5, 1.0, 0.0,
		0.5, 0.5, -0.5, 1.0, 1.0,
		0.5, 0.5, -0.5, 1.0, 1.0,
		-0.5, 0.5, -0.5, 0.0, 1.0,
		-0.5, -0.5, -0.5, 0.0, 0.0,

		-0.5, -0.5, 0.5, 0.0, 0.0,
		0.5, -0.5, 0.5, 1.0, 0.0,
		0.5, 0.5, 0.5, 1.0, 1.0,
		0.5, 0.5, 0.5, 1.0, 1.0,
		-0.5, 0.5, 0.5, 0.0, 1.0,
		-0.5, -0.5, 0.5, 0.0, 0.0,

		-0.5, 0.5, 0.5, 1.0, 0.0,
		-0.5, 0.5, -0.5, 1.0, 1.0,
		-0.5, -0.5, -0.5, 0.0, 1.0,
		-0.5, -0.5, -0.5, 0.0, 1.0,
		-0.5, -0.5, 0.5, 0.0, 0.0,
		-0.5, 0.5, 0.5, 1.0, 0.0,

		0.5, 0.5, 0.5, 1.0, 0.0,
		0.5, 0.5, -0.5, 1.0, 1.0,
		0.5, -0.5, -0.5, 0.0, 1.0,
		0.5, -0.5, -0.5, 0.0, 1.0,
		0.5, -0.5, 0.5, 0.0, 0.0,
		0.5, 0.5, 0.5, 1.0, 0.0,

		-0.5, -0.5, -0.5, 0.0, 1.0,
		0.5, -0.5, -0.5, 1.0, 1.0,
		0.5, -0.5, 0.5, 1.0, 0.0,
		0.5, -0.5, 0.5, 1.0, 0.0,
		-0.5, -0.5, 0.5, 0.0, 0.0,
		-0.5, -0.5, -0.5, 0.0, 1.0,

		-0.5, 0.5, -0.5, 0.0, 1.0,
		0.5, 0.5, -0.5, 1.0, 1.0,
		0.5, 0.5, 0.5, 1.0, 0.0,
		0.5, 0.5, 0.5, 1.0, 0.0,
		-0.5, 0.5, 0.5, 0.0, 0.0,
		-0.5, 0.5, -0.5, 0.0, 1.0,
	}

	indices := []uint32{}

	VAO := createVAO(vertices, indices)
	texture0, err := gfx.NewTextureFromFile("../images/RTS_Crate.png",
		gl.CLAMP_TO_EDGE, gl.CLAMP_TO_EDGE)
	if err != nil {
		panic(err.Error())
	}

	texture1, err := gfx.NewTextureFromFile("../images/trollface-transparent.png",
		gl.CLAMP_TO_EDGE, gl.CLAMP_TO_EDGE)
	if err != nil {
		panic(err.Error())
	}

	cubePositions := [][]float32{
		[]float32{0.0, 0.0, -3.0},
		[]float32{2.0, 5.0, -15.0},
		[]float32{-1.5, -2.2, -2.5},
		[]float32{-3.8, -2.0, -12.3},
		[]float32{2.4, -0.4, -3.5},
		[]float32{-1.7, 3.0, -7.5},
		[]float32{1.3, -2.0, -2.5},
		[]float32{1.5, 2.0, -2.5},
		[]float32{1.5, 0.2, -1.5},
		[]float32{-1.3, 1.0, -1.5},
	}

	gl.Enable(gl.DEPTH_TEST)

	for !window.ShouldClose() {
		// poll events and call their registered callbacks
		glfw.PollEvents()

		// background color
		gl.ClearColor(0.2, 0.5, 0.5, 1.0)
		gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)

		// draw vertices
		program.Use()

		// set texture0 to uniform0 in the fragment shader
		texture0.Bind(gl.TEXTURE0)
		texture0.SetUniform(program.GetUniformLocation("ourTexture0"))

		// set texture1 to uniform1 in the fragment shader
		texture1.Bind(gl.TEXTURE1)
		texture1.SetUniform(program.GetUniformLocation("ourTexture1"))

		// update shader transform matrices

		// Create transformation matrices
		rotateX := (mgl32.Rotate3DX(mgl32.DegToRad(-60 * float32(glfw.GetTime()))))
		rotateY := (mgl32.Rotate3DY(mgl32.DegToRad(-60 * float32(glfw.GetTime()))))
		rotateZ := (mgl32.Rotate3DZ(mgl32.DegToRad(-60 * float32(glfw.GetTime()))))

		viewTransform := mgl32.Translate3D(0, 0, -3)
		projectTransform := mgl32.Perspective(mgl32.DegToRad(60), windowWidth/windowHeight, 0.1, 100.0)

		gl.UniformMatrix4fv(program.GetUniformLocation("view"), 1, false,
			&viewTransform[0])
		gl.UniformMatrix4fv(program.GetUniformLocation("project"), 1, false,
			&projectTransform[0])

		gl.UniformMatrix4fv(program.GetUniformLocation("worldRotateX"), 1, false,
			&rotateX[0])
		gl.UniformMatrix4fv(program.GetUniformLocation("worldRotateY"), 1, false,
			&rotateY[0])
		gl.UniformMatrix4fv(program.GetUniformLocation("worldRotateZ"), 1, false,
			&rotateZ[0])

		gl.BindVertexArray(VAO)

		for _, pos := range cubePositions {

			worldTranslate := mgl32.Translate3D(pos[0], pos[1], pos[2])
			worldTransform := (worldTranslate.Mul4(rotateX.Mul3(rotateY).Mul3(rotateZ).Mat4()))

			gl.UniformMatrix4fv(program.GetUniformLocation("world"), 1, false,
				&worldTransform[0])

			gl.DrawArrays(gl.TRIANGLES, 0, 36)
		}
		// gl.DrawElements(gl.TRIANGLES, 36, gl.UNSIGNED_INT, unsafe.Pointer(nil))
		gl.BindVertexArray(0)

		texture0.UnBind()
		texture1.UnBind()

		// end of draw loop

		// swap in the rendered buffer
		window.SwapBuffers()
	}

	return nil
}
Exemplo n.º 25
0
func Main() {
	err := glfw.Init()
	if err != nil {
		panic(err)
	}
	defer glfw.Terminate()

	glfw.WindowHint(glfw.Resizable, glfw.False)
	glfw.WindowHint(glfw.ContextVersionMajor, 3)
	glfw.WindowHint(glfw.ContextVersionMinor, 2)
	glfw.WindowHint(glfw.OpenGLProfile, glfw.OpenGLCoreProfile)
	glfw.WindowHint(glfw.OpenGLForwardCompatible, glfw.True)
	window, err := glfw.CreateWindow(WindowWidth, WindowHeight, "Cube", nil, nil)
	Window = window
	if err != nil {
		panic(err)
	}
	window.MakeContextCurrent()

	// Initialize Glow
	if err := gl.Init(); err != nil {
		panic(err)
	}

	version := gl.GoStr(gl.GetString(gl.VERSION))
	fmt.Println("OpenGL version", version)

	// Configure the vertex and fragment shaders
	program, err := newProgram("SimpleVertexShader.vertexshader", "SimpleFragmentShader.fragmentshader")
	if err != nil {
		panic(err)
	}
	gl.UseProgram(program)

	projection := mgl32.Perspective(mgl32.DegToRad(45.0), float32(WindowWidth)/WindowHeight, 0.1, 10.0)
	projectionUniform := gl.GetUniformLocation(program, gl.Str("projection\x00"))
	gl.UniformMatrix4fv(projectionUniform, 1, false, &projection[0])

	camera := mgl32.LookAtV(mgl32.Vec3{3, 3, 3}, mgl32.Vec3{0, 0, 0}, mgl32.Vec3{0, 1, 0})
	cameraUniform := gl.GetUniformLocation(program, gl.Str("camera\x00"))
	gl.UniformMatrix4fv(cameraUniform, 1, false, &camera[0])

	model := mgl32.Ident4()
	modelUniform := gl.GetUniformLocation(program, gl.Str("model\x00"))
	gl.UniformMatrix4fv(modelUniform, 1, false, &model[0])

	textureUniform := gl.GetUniformLocation(program, gl.Str("tex\x00"))
	gl.Uniform1i(textureUniform, 0)

	gl.BindFragDataLocation(program, 0, gl.Str("outputColor\x00"))
	// Configure global settings
	gl.Enable(gl.DEPTH_TEST)
	gl.DepthFunc(gl.LESS)
	gl.ClearColor(1.0, 1.0, 1.0, 1.0)

	angle := 0.0
	previousTime := glfw.GetTime()

	width, height := window.GetSize()
	window.SetCursorPos(float64(width/2), float64(height/2))
	window.SetKeyCallback(input.OnKey)
	window.SetCursorPosCallback(input.OnCursor)
	window.SetMouseButtonCallback(input.OnMouse)

	meshes.LoadColladaCube("cube.dae")

	for !player.ShouldClose {
		gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)

		// Update
		time := glfw.GetTime()
		elapsed := time - previousTime
		previousTime = time

		angle += elapsed
		model = mgl32.HomogRotate3D(float32(angle), mgl32.Vec3{0, 1, 0})

		// Render
		gl.UseProgram(program)
		// gl.UniformMatrix4fv(modelUniform, 1, false, &model[0])
		player.MainPlayer.Draw(program)
		for _, element := range game.Universe {
			(element).Draw(program)
		}

		// Maintenance
		window.SwapBuffers()
		glfw.PollEvents()
	}
}
Exemplo n.º 26
0
func main() {
	vertices, normals := obj.Parse(os.Args[1])

	// initialize GLFW
	if err := glfw.Init(); err != nil {
		panic(err)
	}
	defer glfw.Terminate()

	// set opengl core profile 3.3
	glfw.WindowHint(glfw.ContextVersionMajor, 3)
	glfw.WindowHint(glfw.ContextVersionMinor, 3)
	glfw.WindowHint(glfw.OpenGLProfile, glfw.OpenGLCoreProfile)
	glfw.WindowHint(glfw.OpenGLForwardCompatible, glfw.True)

	window, err := glfw.CreateWindow(640, 480, "GOpenGL", nil, nil)
	if err != nil {
		panic(err)
	}
	window.MakeContextCurrent()

	// initialise OpenGL library
	if err := gl.Init(); err != nil {
		panic(err)
	}

	// link program from shaders
	program, err := newProgram("vertex.glsl", "fragment.glsl")
	if err != nil {
		panic(err)
	}
	gl.UseProgram(program)

	// vertex attribute object holds links between attributes and vbo
	var vao uint32
	gl.GenVertexArrays(1, &vao)
	gl.BindVertexArray(vao)

	// vertex buffer with per-vertex data
	var vbo [2]uint32
	gl.GenBuffers(2, &vbo[0])

	// position data
	gl.BindBuffer(gl.ARRAY_BUFFER, vbo[0])
	gl.BufferData(gl.ARRAY_BUFFER, len(vertices)*4, gl.Ptr(vertices), gl.STATIC_DRAW)

	// set up position attribute with layout of vertices
	posAttrib := uint32(gl.GetAttribLocation(program, gl.Str("position\x00")))
	gl.VertexAttribPointer(posAttrib, 3, gl.FLOAT, false, 3*4, gl.PtrOffset(0))
	gl.EnableVertexAttribArray(posAttrib)

	// normal data
	gl.BindBuffer(gl.ARRAY_BUFFER, vbo[1])
	gl.BufferData(gl.ARRAY_BUFFER, len(normals)*4, gl.Ptr(normals), gl.STATIC_DRAW)

	normAttrib := uint32(gl.GetAttribLocation(program, gl.Str("normal\x00")))
	gl.VertexAttribPointer(normAttrib, 3, gl.FLOAT, false, 3*4, gl.PtrOffset(0))
	gl.EnableVertexAttribArray(normAttrib)

	uniModel := gl.GetUniformLocation(program, gl.Str("model\x00"))
	uniView := gl.GetUniformLocation(program, gl.Str("view\x00"))
	uniProj := gl.GetUniformLocation(program, gl.Str("proj\x00"))

	matView := mgl32.LookAt(2.0, 2.0, 2.0,
		0.0, 0.0, 0.0,
		0.0, 0.0, 1.0)
	gl.UniformMatrix4fv(uniView, 1, false, &matView[0])

	matProj := mgl32.Perspective(mgl32.DegToRad(45.0), 640.0/480.0, 1.0, 10.0)
	gl.UniformMatrix4fv(uniProj, 1, false, &matProj[0])

	uniLightDir := gl.GetUniformLocation(program, gl.Str("lightDir\x00"))
	uniLightCol := gl.GetUniformLocation(program, gl.Str("lightCol\x00"))

	gl.Uniform3f(uniLightDir, -0.5, 0.0, -1.0)
	gl.Uniform3f(uniLightCol, 0.0, 0.5, 0.5)

	startTime := glfw.GetTime()
	gl.Enable(gl.DEPTH_TEST)
	gl.ClearColor(1.0, 1.0, 1.0, 1.0)

	for !window.ShouldClose() {
		// clear buffer
		gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)

		matRot := mgl32.HomogRotate3DZ(float32(glfw.GetTime() - startTime))
		gl.UniformMatrix4fv(uniModel, 1, false, &matRot[0])

		gl.DrawArrays(gl.TRIANGLES, 0, int32(len(vertices)))

		window.SwapBuffers()
		glfw.PollEvents()
	}
}
Exemplo n.º 27
0
//SetPerspective sets the projection to perspective.
func (c *Camera) SetPerspective(angle, ratio, zNear, zFar float32) {
	c.Projection = glm.Perspective(angle, ratio, zNear, zFar)
}
Exemplo n.º 28
0
// Perspective computes the projection matrix and saves it
func (c *EulerCamera) SetPerspective(fovy, aspect, near, far float32) {
	c.projection = mgl.Perspective(fovy, aspect, near, far)
}
Exemplo n.º 29
0
func main() {
	if err := glfw.Init(); err != nil {
		log.Fatalln("failed to initialize glfw:", err)
	}
	defer glfw.Terminate()

	glfw.WindowHint(glfw.Resizable, glfw.False)
	glfw.WindowHint(glfw.ContextVersionMajor, 4)
	glfw.WindowHint(glfw.ContextVersionMinor, 1)
	glfw.WindowHint(glfw.OpenGLProfile, glfw.OpenGLCoreProfile)
	glfw.WindowHint(glfw.OpenGLForwardCompatible, glfw.True)
	window, err := glfw.CreateWindow(windowWidth, windowHeight, "Cube", nil, nil)

	if err != nil {
		panic(err)
	}
	window.MakeContextCurrent()

	// Initialize Glow
	if err := gl.Init(); err != nil {
		panic(err)
	}

	version := gl.GoStr(gl.GetString(gl.VERSION))
	fmt.Println("OpenGL version", version)

	// Configure the vertex and fragment shaders
	program, err := newProgram(vertexShader, fragmentShader)

	if err != nil {
		panic(err)
	}

	gl.UseProgram(program)

	projection := mgl32.Perspective(mgl32.DegToRad(45.0), float32(windowWidth)/windowHeight, 0.1, 10.0)
	projectionUniform := gl.GetUniformLocation(program, gl.Str("projection\x00"))
	gl.UniformMatrix4fv(projectionUniform, 1, false, &projection[0])

	camera := mgl32.LookAtV(mgl32.Vec3{3, 3, 3}, mgl32.Vec3{0, 0, 0}, mgl32.Vec3{0, 1, 0})
	cameraUniform := gl.GetUniformLocation(program, gl.Str("camera\x00"))
	gl.UniformMatrix4fv(cameraUniform, 1, false, &camera[0])

	model := mgl32.Ident4()
	modelUniform := gl.GetUniformLocation(program, gl.Str("model\x00"))
	gl.UniformMatrix4fv(modelUniform, 1, false, &model[0])

	textureUniform := gl.GetUniformLocation(program, gl.Str("tex\x00"))
	gl.Uniform1i(textureUniform, 0)

	gl.BindFragDataLocation(program, 0, gl.Str("outputColor\x00"))

	// Load the texture
	texture, err := newTexture("square.png")
	if err != nil {
		panic(err)
	}

	// Configure the vertex data
	var vao uint32
	gl.GenVertexArrays(1, &vao)
	gl.BindVertexArray(vao)

	var vbo uint32
	gl.GenBuffers(1, &vbo)
	gl.BindBuffer(gl.ARRAY_BUFFER, vbo)
	gl.BufferData(gl.ARRAY_BUFFER, len(cubeVertices)*4, gl.Ptr(cubeVertices), gl.STATIC_DRAW)

	vertAttrib := uint32(gl.GetAttribLocation(program, gl.Str("vert\x00")))
	gl.EnableVertexAttribArray(vertAttrib)
	gl.VertexAttribPointer(vertAttrib, 3, gl.FLOAT, false, 5*4, gl.PtrOffset(0))

	texCoordAttrib := uint32(gl.GetAttribLocation(program, gl.Str("vertTexCoord\x00")))
	gl.EnableVertexAttribArray(texCoordAttrib)
	gl.VertexAttribPointer(texCoordAttrib, 2, gl.FLOAT, false, 5*4, gl.PtrOffset(3*4))

	// Configure global settings
	gl.Enable(gl.DEPTH_TEST)
	gl.DepthFunc(gl.LESS)
	gl.ClearColor(1.0, 1.0, 1.0, 1.0)

	angle := 0.0
	previousTime := glfw.GetTime()

	for !window.ShouldClose() {
		gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)

		// Update
		time := glfw.GetTime()
		elapsed := time - previousTime
		previousTime = time

		angle += elapsed
		model = mgl32.HomogRotate3D(float32(angle), mgl32.Vec3{0, 1, 0})

		// Render
		gl.UseProgram(program)
		gl.UniformMatrix4fv(modelUniform, 1, false, &model[0])

		gl.BindVertexArray(vao)

		gl.ActiveTexture(gl.TEXTURE0)
		gl.BindTexture(gl.TEXTURE_2D, texture)

		gl.DrawArrays(gl.TRIANGLES, 0, 6*2*3)

		// Maintenance
		window.SwapBuffers()
		glfw.PollEvents()
	}
}
Exemplo n.º 30
0
// SetPerspective set a perspective projection
func (cam *Camera) SetPerspective(angle float32, w int, h int, zDepth int) {
	cam.Bounds = mgl32.Vec3{float32(w), float32(h), float32(zDepth)}
	cam.projection = mgl32.Perspective(mgl32.DegToRad(angle), float32(w)/float32(h), 0.1, 10.0)
	cam.update()
}