Exemple #1
0
Fichier : sf.go Projet : toophy/vu
// initScene is one time initialization that creates a single VAO
func (sf *sftag) initScene() {
	sf.sTime = time.Now()
	sf.initData()

	// Bind the OpenGL calls and dump some version info.
	gl.Init()
	fmt.Printf("%s %s", gl.GetString(gl.RENDERER), gl.GetString(gl.VERSION))
	fmt.Printf(" GLSL %s\n", gl.GetString(gl.SHADING_LANGUAGE_VERSION))
	gl.GenVertexArrays(1, &sf.vao)
	gl.BindVertexArray(sf.vao)

	// vertex data.
	var vbuff uint32
	gl.GenBuffers(1, &vbuff)
	gl.BindBuffer(gl.ARRAY_BUFFER, vbuff)
	gl.BufferData(gl.ARRAY_BUFFER, int64(len(sf.verticies)*4), gl.Pointer(&(sf.verticies[0])), gl.STATIC_DRAW)
	gl.VertexAttribPointer(0, 3, gl.FLOAT, false, 0, 0)
	gl.EnableVertexAttribArray(0)

	// faces data.
	var ebuff uint32
	gl.GenBuffers(1, &ebuff)
	gl.BindBuffer(gl.ELEMENT_ARRAY_BUFFER, ebuff)
	gl.BufferData(gl.ELEMENT_ARRAY_BUFFER, int64(len(sf.faces)), gl.Pointer(&(sf.faces[0])), gl.STATIC_DRAW)

	// create texture and shaders after all the data has been set up.
	// renderer := render.New()
	shader := "fire"
	loader := load.NewLoader()
	vsrc, verr := loader.Vsh(shader)
	fsrc, ferr := loader.Fsh(shader)
	if verr == nil && ferr == nil {
		sf.shaders = gl.CreateProgram()
		if err := gl.BindProgram(sf.shaders, vsrc, fsrc); err != nil {
			fmt.Printf("Failed to create program: %s\n", err)
		}
		sf.mvpref = gl.GetUniformLocation(sf.shaders, "mvpm")
		sf.gTime = gl.GetUniformLocation(sf.shaders, "time")
		sf.sizes = gl.GetUniformLocation(sf.shaders, "screen")
		sf.mvp = render.NewMvp().Set(lin.NewM4().Ortho(0, 4, 0, 4, 0, 10))

		// set some state that doesn't need to change during drawing.
		gl.ClearColor(0.0, 0.0, 0.0, 1.0)
	}
}
Exemple #2
0
Fichier : ld.go Projet : toophy/vu
// initShader compiles shaders and links them into a shader program.
func (ld *ldtag) initShader() {
	shader := "monkey"
	loader := load.NewLoader()
	vsrc, verr := loader.Vsh(shader)
	fsrc, ferr := loader.Fsh(shader)
	if verr == nil && ferr == nil {
		ld.shaders = gl.CreateProgram()
		if err := gl.BindProgram(ld.shaders, vsrc, fsrc); err != nil {
			fmt.Printf("Failed to create program: %s\n", err)
		}
		ld.mvpref = gl.GetUniformLocation(ld.shaders, "modelViewProjectionMatrix")
		if ld.mvpref < 0 {
			fmt.Printf("No modelViewProjectionMatrix in vertex shader\n")
		}
	}
}
Exemple #3
0
// initShader compiles shaders and links them into a shader program.
func (tag *trtag) initShader() {
	shader := "basic"
	loader := load.NewLoader()
	vsrc, verr := loader.Vsh(shader)
	fsrc, ferr := loader.Fsh(shader)
	if verr == nil && ferr == nil {
		tag.shaders = gl.CreateProgram()
		if err := gl.BindProgram(tag.shaders, vsrc, fsrc); err != nil {
			fmt.Printf("Failed to create program: %s\n", err)
		}
		tag.mvpRef = gl.GetUniformLocation(tag.shaders, "mvpm")
		if tag.mvpRef < 0 {
			fmt.Printf("No model-view-projection matrix in vertex shader\n")
		}
	}
}
Exemple #4
0
// initRender is one time initialization that creates a single VAO
// to display a single ray trace generated texture.
func (rt *rtrace) initRender() {
	rt.verts = []float32{ // four verticies for a quad.
		0, 0, 0,
		4, 0, 0,
		0, 4, 0,
		4, 4, 0,
	}
	rt.faces = []uint8{ // create quad from 2 triangles.
		0, 2, 1,
		1, 2, 3,
	}
	rt.uvs = []float32{ // texture coordinates to sample the image.
		0, 0,
		1, 0,
		0, 1,
		1, 1,
	}

	// Start up OpenGL and create a single vertex array object.
	gl.Init()
	gl.GenVertexArrays(1, &rt.vao)
	gl.BindVertexArray(rt.vao)

	// vertex data.
	var vbuff uint32
	gl.GenBuffers(1, &vbuff)
	gl.BindBuffer(gl.ARRAY_BUFFER, vbuff)
	gl.BufferData(gl.ARRAY_BUFFER, int64(len(rt.verts)*4), gl.Pointer(&(rt.verts[0])), gl.STATIC_DRAW)
	gl.VertexAttribPointer(0, 3, gl.FLOAT, false, 0, 0)
	gl.EnableVertexAttribArray(0)

	// faces data.
	var ebuff uint32
	gl.GenBuffers(1, &ebuff)
	gl.BindBuffer(gl.ELEMENT_ARRAY_BUFFER, ebuff)
	gl.BufferData(gl.ELEMENT_ARRAY_BUFFER, int64(len(rt.faces)), gl.Pointer(&(rt.faces[0])), gl.STATIC_DRAW)

	// texture coordatinates
	var tbuff uint32
	gl.GenBuffers(1, &tbuff)
	gl.BindBuffer(gl.ARRAY_BUFFER, tbuff)
	gl.BufferData(gl.ARRAY_BUFFER, int64(len(rt.uvs)*4), gl.Pointer(&(rt.uvs[0])), gl.STATIC_DRAW)
	var tattr uint32 = 2
	gl.VertexAttribPointer(tattr, 2, gl.FLOAT, false, 0, 0)
	gl.EnableVertexAttribArray(tattr)

	// use ray trace generated texture image.
	bounds := rt.img.Bounds()
	width, height := int32(bounds.Dx()), int32(bounds.Dy())
	ptr := gl.Pointer(&(rt.img.Pix[0]))
	gl.GenTextures(1, &rt.texId)
	gl.BindTexture(gl.TEXTURE_2D, rt.texId)
	gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST)
	gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST)
	gl.TexImage2D(gl.TEXTURE_2D, 0, gl.RGBA, width, height, 0, gl.RGBA, gl.UNSIGNED_BYTE, ptr)

	// texture sampling shader.
	loader := load.NewLoader()
	shader := "tuv"
	vsrc, verr := loader.Vsh(shader)
	fsrc, ferr := loader.Fsh(shader)
	if verr != nil || ferr != nil {
		log.Fatalf("Failed to load shaders %s %s\n", verr, ferr)
	}
	rt.shaders = gl.CreateProgram()
	if err := gl.BindProgram(rt.shaders, vsrc, fsrc); err != nil {
		log.Fatalf("Failed to create program: %s\n", err)
	}
	rt.mvpId = gl.GetUniformLocation(rt.shaders, "mvpm")
	rt.tex2D = gl.GetUniformLocation(rt.shaders, "sampler2D")
	rt.mvp = render.NewMvp().Set(lin.NewM4().Ortho(0, 4, 0, 4, 0, 10))

	// set some state that doesn't need to change during drawing.
	gl.ClearColor(0.0, 0.0, 0.0, 1.0)
}