func (t *Text) Draw() {
if t.IsDebug {
t.BoundingBox.Draw()
}
gl.UseProgram(t.font.program)
gl.ActiveTexture(gl.TEXTURE0)
gl.BindTexture(gl.TEXTURE_2D, t.font.textureID)
// uniforms
gl.Uniform1i(t.font.fragmentTextureUniform, 0)
gl.Uniform4fv(t.font.colorUniform, 1, &t.color[0])
gl.Uniform2fv(t.font.finalPositionUniform, 1, &t.finalPosition[0])
gl.UniformMatrix4fv(t.font.orthographicMatrixUniform, 1, false, &t.font.OrthographicMatrix[0])
gl.UniformMatrix4fv(t.font.scaleMatrixUniform, 1, false, &t.scaleMatrix[0])
// draw
drawCount := int32(t.RuneCount * 6)
if drawCount > int32(t.eboIndexCount) {
drawCount = int32(t.eboIndexCount)
}
if drawCount < 0 {
drawCount = 0
}
gl.Enable(gl.BLEND)
gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
gl.BindVertexArray(t.vao)
gl.DrawElements(gl.TRIANGLES, drawCount, gl.UNSIGNED_INT, nil)
gl.BindVertexArray(0)
gl.Disable(gl.BLEND)
}
func (tr *TextRenderer) Bind() error {
gl.UseProgram(tr.Program)
if e := gl.GetError(); e != 0 {
return fmt.Errorf("ERROR: %X", e)
}
gl.Uniform1i(tr.TextureUnitLoc, 0)
if e := gl.GetError(); e != 0 {
return fmt.Errorf("ERROR: %X", e)
}
gl.BindBuffer(gl.ARRAY_BUFFER, tr.VBO)
if e := gl.GetError(); e != 0 {
return fmt.Errorf("ERROR: %X", e)
}
gl.EnableVertexAttribArray(tr.PositionLoc)
gl.VertexAttribPointer(tr.PositionLoc, 3, gl.FLOAT, false, 5*4, gl.PtrOffset(0))
if e := gl.GetError(); e != 0 {
return fmt.Errorf("ERROR: %X", e)
}
gl.EnableVertexAttribArray(tr.TextureLoc)
gl.VertexAttribPointer(tr.TextureLoc, 2, gl.FLOAT, false, 5*4, gl.PtrOffset(3*4))
if e := gl.GetError(); e != 0 {
return fmt.Errorf("ERROR: %X", e)
}
gl.UniformMatrix4fv(tr.ProjectionLoc, 1, false, &tr.Renderer.Camera.Projection[0])
if e := gl.GetError(); e != 0 {
return fmt.Errorf("ERROR: %X", e)
}
return nil
}
func (lr *LinesRenderer) Draw(line *LineGeometry, mv mgl32.Mat4, style *LineStyle) (err error) {
var (
dataBytes int = len(line.Vertices) * int(lr.stride)
indexBytes int = len(line.Indices) * int(lr.stride)
elementCount int32 = int32(len(line.Indices))
r, g, b, a = style.Color.RGBA()
)
gl.Uniform1f(lr.thicknessLoc, style.Thickness)
gl.Uniform1f(lr.innerLoc, style.Inner)
gl.Uniform4f(lr.colorLoc, float32(r)/255.0, float32(g)/255.0, float32(b)/255.0, float32(a)/255.0)
gl.UniformMatrix4fv(lr.modelviewLoc, 1, false, &mv[0])
if dataBytes > lr.bufferBytes {
lr.bufferBytes = dataBytes
gl.BufferData(gl.ARRAY_BUFFER, dataBytes, gl.Ptr(line.Vertices), gl.STREAM_DRAW)
gl.BufferData(gl.ELEMENT_ARRAY_BUFFER, indexBytes, gl.Ptr(line.Indices), gl.STREAM_DRAW)
} else {
gl.BufferSubData(gl.ARRAY_BUFFER, 0, dataBytes, gl.Ptr(line.Vertices))
gl.BufferSubData(gl.ELEMENT_ARRAY_BUFFER, 0, indexBytes, gl.Ptr(line.Indices))
}
gl.DrawElements(gl.TRIANGLES, elementCount, gl.UNSIGNED_INT, gl.PtrOffset(0))
if e := gl.GetError(); e != 0 {
err = fmt.Errorf("ERROR: OpenGL error %X", e)
}
return
}
func (rt *renderableText) render(x, y float32) {
m := newScaleMatrix(rt.width, rt.height, 1)
m = m.mult(newTranslationMatrix(x, y, 0))
gl.UniformMatrix4fv(modelMatrixUniform, 1, false, &m[0])
gl.Uniform1i(textureUniform, int32(rt.texture)-1)
textLineMesh.drawElements()
}
func (r *BatchRenderer) Bind() error {
gl.UseProgram(r.Program)
gl.ActiveTexture(gl.TEXTURE0)
gl.Uniform1i(r.TextureUnitLoc, 0)
gl.UniformMatrix4fv(r.ProjectionLoc, 1, false, &r.Camera.Projection[0])
return nil
}
func renderCellBlock(metrics *metrics, c *game.Cell, x, y int) {
bv := float32(0)
if c.Block.State == game.BlockFlashing {
bv = pulse(metrics.g.GlobalPulse+metrics.fudge, 0, 0.5, 1.5)
}
gl.Uniform1f(brightnessUniform, bv)
m := metrics.blockMatrix(c.Block, x, y)
gl.UniformMatrix4fv(modelMatrixUniform, 1, false, &m[0])
blockMeshes[c.Block.Color].drawElements()
}
func (b *BoundingBox) Draw() {
gl.UseProgram(b.program)
// uniforms
gl.Uniform2fv(b.finalPositionUniform, 1, &b.finalPosition[0])
gl.UniformMatrix4fv(b.orthographicMatrixUniform, 1, false, &b.font.OrthographicMatrix[0])
// draw
gl.BindVertexArray(b.vao)
gl.DrawElements(gl.TRIANGLES, int32(b.eboIndexCount), gl.UNSIGNED_INT, nil)
gl.BindVertexArray(0)
}
func Draw() {
// if len(layers) == 0 {
// fmt.Println("layers empty!!!")
// return
// }
// for _, layer := range layers {
// vertexData := textureHash[layer]
vertexData := &vertexDataTest
// check to see if there are any vertices at all to draw
if len(vertexData.vertexData) == 0 {
return
}
// vertexData.Print()
// vertexData := vertexDataTest
//vertexData.Print()
// BindBuffers(vertexData)
// vertexData.Print()
//gl.BufferSubData(gl.ARRAY_BUFFER, 0, len(vertexData.VertexData)*4, gl.Ptr(vertexData.VertexData))
// gl.BindBuffer(gl.ARRAY_BUFFER, vbo)
gl.BufferData(gl.ARRAY_BUFFER, len(vertexData.vertexData)*4, gl.Ptr(vertexData.vertexData), gl.DYNAMIC_DRAW)
// gl.BindBuffer(gl.ELEMENT_ARRAY_BUFFER, elementvbo)
// gl.BufferData(gl.ELEMENT_ARRAY_BUFFER, len(vertexData.Elements)*4, gl.Ptr(vertexData.Elements), gl.DYNAMIC_DRAW)
MVP := projectionM.Mul4(viewM) //.Mul4(Model)
gl.UniformMatrix4fv(MVPid, 1, false, &MVP[0])
lightPos := mathgl.Vec3{0, 3, 10}
lightintensities := mathgl.Vec3{1, .4, .2}
gl.Uniform3f(lightpositionID, lightPos[0], lightPos[1], lightPos[2])
gl.Uniform3f(lightintensitiesID, lightintensities[0], lightintensities[1], lightintensities[2])
gl.Uniform3f(cameraPositionID, 0.0, 1.0, -1.0)
// vertexData.Print()
// gl.DrawElements(gl.TRIANGLES, int32(len(vertexData.Elements)), gl.UNSIGNED_INT, nil)
// }
numTriVerts := int32((len(vertexData.vertexData) / (int(NUM_ATTRIBUTES) * 2)) * 3)
gl.DrawArrays(gl.TRIANGLES, 0, numTriVerts)
ClearVertexData()
}
func (r *Framerate) Render(camera *core.Camera) (err error) {
r.data.Sample()
var (
modelView = mgl32.Ident4()
dataBytes int = int(r.data.Count) * int(r.stride)
)
gl.Uniform4f(r.locColor, 255.0/255.0, 0, 0, 255.0/255.0)
gl.UniformMatrix4fv(r.locModelView, 1, false, &modelView[0])
gl.UniformMatrix4fv(r.locProjection, 1, false, &camera.Projection[0])
if dataBytes > r.vboBytes {
r.vboBytes = dataBytes
gl.BufferData(gl.ARRAY_BUFFER, dataBytes, gl.Ptr(r.data.Points), gl.STREAM_DRAW)
} else {
gl.BufferSubData(gl.ARRAY_BUFFER, 0, dataBytes, gl.Ptr(r.data.Points))
}
gl.DrawArrays(gl.POINTS, 0, r.data.Count)
if e := gl.GetError(); e != 0 {
err = fmt.Errorf("ERROR: OpenGL error %X", e)
}
return
}
func (r *BatchRenderer) Draw(batch *Batch, x, y, rot float32) error {
batch.Texture.Bind()
gl.BindBuffer(gl.ARRAY_BUFFER, batch.Buffer)
gl.EnableVertexAttribArray(r.PositionLoc)
gl.VertexAttribPointer(r.PositionLoc, 3, gl.FLOAT, false, 5*4, gl.PtrOffset(0))
gl.EnableVertexAttribArray(r.TextureLoc)
gl.VertexAttribPointer(r.TextureLoc, 2, gl.FLOAT, false, 5*4, gl.PtrOffset(3*4))
m := mgl32.Translate3D(x, y, 0.0).Mul4(mgl32.HomogRotate3DZ(rot))
gl.UniformMatrix4fv(r.ModelViewLoc, 1, false, &m[0])
gl.Uniform2f(r.TexOffsetLoc, batch.textureOffset.X(), batch.textureOffset.Y())
gl.DrawArrays(gl.TRIANGLES, 0, int32(batch.Count))
gl.BindBuffer(gl.ARRAY_BUFFER, 0)
return nil
}
func (c Context) DrawRectangle(x, y, w, h float32, color Color) {
gl.UseProgram(c.program)
model := mgl32.Translate3D(x, y, 0).Mul4(mgl32.Scale3D(w, h, 0))
modelUniform := gl.GetUniformLocation(c.program, gl.Str("model\x00"))
gl.UniformMatrix4fv(modelUniform, 1, false, &model[0])
colorArray := []float32{color.B, color.G, color.R}
colorUniform := gl.GetUniformLocation(c.program, gl.Str("color\x00"))
gl.Uniform4fv(colorUniform, 1, &colorArray[0])
gl.DrawArrays(gl.TRIANGLES, 0, 6)
}
func (lr *LinesRenderer) Bind() (err error) {
gl.UseProgram(lr.program)
gl.BindBuffer(gl.ARRAY_BUFFER, lr.buffer)
gl.BindBuffer(gl.ELEMENT_ARRAY_BUFFER, lr.indexBuffer)
gl.EnableVertexAttribArray(lr.positionLoc)
gl.EnableVertexAttribArray(lr.normalLoc)
gl.EnableVertexAttribArray(lr.miterLoc)
gl.VertexAttribPointer(lr.positionLoc, 2, gl.FLOAT, false, lr.stride, lr.offPosition)
gl.VertexAttribPointer(lr.normalLoc, 2, gl.FLOAT, false, lr.stride, lr.offNormal)
gl.VertexAttribPointer(lr.miterLoc, 1, gl.FLOAT, false, lr.stride, lr.offMiter)
gl.UniformMatrix4fv(lr.projectionLoc, 1, false, &lr.Renderer.Camera.Projection[0])
if e := gl.GetError(); e != 0 {
err = fmt.Errorf("ERROR: OpenGL error %X", e)
}
return
}
func renderMarker(metrics *metrics, m *game.Marker, x, y int) {
switch m.State {
case game.MarkerShowing:
var val string
switch {
case m.ChainLevel > 0:
val = "x" + strconv.Itoa(m.ChainLevel+1)
case m.ComboLevel > 3:
val = strconv.Itoa(m.ComboLevel)
default:
return
}
sc := float32(0.5)
tx := -float32(len(val)-1) * sc
ty := metrics.globalTranslationY + cellTranslationY*-float32(y) + easeOutCubic(m.StateProgress(metrics.fudge), 0, 0.5)
tz := metrics.globalTranslationZ + cellTranslationZ/2 + 0.1
ry := metrics.globalRotationY + metrics.cellRotationY*-float32(x)
yq := newAxisAngleQuaternion(yAxis, ry)
qm := newQuaternionMatrix(yq.normalize())
gl.Uniform1f(brightnessUniform, 0)
gl.Uniform1f(alphaUniform, easeOutCubic(m.StateProgress(metrics.fudge), 1, -1))
for _, rune := range val {
text := markerRuneText[rune]
m := newScaleMatrix(sc, sc, sc)
m = m.mult(newTranslationMatrix(tx, ty, tz))
m = m.mult(qm)
gl.UniformMatrix4fv(modelMatrixUniform, 1, false, &m[0])
gl.Uniform1i(textureUniform, int32(text.texture)-1)
squareMesh.drawElements()
tx++
}
gl.Uniform1i(textureUniform, int32(boardTexture)-1)
}
}
func renderHUD(g *game.Game, fudge float32) {
gl.UniformMatrix4fv(projectionViewMatrixUniform, 1, false, &orthoProjectionViewMatrix[0])
gl.Uniform1f(grayscaleUniform, 0)
gl.Uniform1f(brightnessUniform, 0)
gl.Uniform1f(alphaUniform, 1)
i := 1
renderText := func(item game.HUDItem, val string) {
text := hudItemText[item]
x := float32(winWidth)/4*float32(i) - text.width/2
y := float32(winHeight) - text.height*2
text.render(x, y)
var valWidth, valHeight float32
for _, rune := range val {
text := hudRuneText[rune]
valWidth += text.width
if text.height > valHeight {
valHeight = text.height
}
}
x = float32(winWidth)/4*float32(i) - valWidth/2
y -= valHeight * 1.5
for _, rune := range val {
text := hudRuneText[rune]
text.render(x, y)
x += text.width
}
i++
}
renderText(game.HUDItemSpeed, formattedSpeed(g))
renderText(game.HUDItemTime, formattedTime(g))
renderText(game.HUDItemScore, formattedScore(g))
}
func renderMenu(g *game.Game, fudge float32) {
ease := func(start, change float32) float32 {
return easeOutCubic(g.StateProgress(fudge), start, change)
}
alpha := float32(1)
switch g.State {
case game.GameInitial, game.GamePaused:
alpha = ease(0, 1)
case game.GamePlaying, game.GameExiting:
alpha = ease(1, -1)
}
// Don't render the menu if it is invisible.
if alpha == 0 {
return
}
gl.UniformMatrix4fv(projectionViewMatrixUniform, 1, false, &orthoProjectionViewMatrix[0])
gl.Uniform1f(grayscaleUniform, 0)
gl.Uniform1f(brightnessUniform, 0)
gl.Uniform1f(alphaUniform, alpha)
gl.Uniform1f(mixAmountUniform, 0)
menu := g.Menu
titleText := menuTitleText[menu.ID]
totalHeight := titleText.height * 2
for _, item := range menu.Items {
totalHeight += float32(menuItemFontSize) * 2
if !item.SingleChoice() {
totalHeight += float32(menuItemFontSize) * 2
}
}
currentY := (float32(winHeight) + totalHeight) / 2
centerX := func(txt *renderableText) float32 {
return (float32(winWidth) - txt.width) / 2
}
renderText := func(text *renderableText) {
currentY -= text.height
text.render(centerX(text), currentY)
currentY -= text.height // add spacing for next item
}
// TODO(btmura): split these out into separate functions
renderSlider := func(item *game.MenuItem) {
val := strconv.Itoa(item.Slider.Value)
var valWidth, valHeight float32
for _, rune := range val {
text := menuRuneText[rune]
valWidth += text.width
if text.height > valHeight {
valHeight = text.height
}
}
currentY -= valHeight
x := (float32(winWidth) - valWidth) / 2
for _, rune := range val {
text := menuRuneText[rune]
text.render(x, currentY)
x += text.width
}
currentY -= valHeight
}
renderMenuItem := func(index int, item *game.MenuItem) {
var brightness float32
if menu.FocusedIndex == index {
switch {
case menu.Selected:
brightness = pulse(g.GlobalPulse+fudge, 1, 1, 1)
case item.SingleChoice():
brightness = pulse(g.GlobalPulse+fudge, 1, 0.3, 0.06)
default:
brightness = 1
}
}
gl.Uniform1f(brightnessUniform, brightness)
renderText(menuItemText[item.ID])
switch {
case item.Selector != nil:
renderText(menuChoiceText[item.Selector.Value()])
case item.Slider != nil:
renderSlider(item)
}
}
renderText(titleText)
for i, item := range menu.Items {
renderMenuItem(i, item)
}
}
func CreateContext(width, height int) Context {
vertexShader := `
#version 330
uniform mat4 projection;
uniform mat4 camera;
uniform mat4 model;
in vec3 vert;
void main() {
gl_Position = projection * camera * model * vec4(vert, 1);
}
` + "\x00"
fragmentShader := `
#version 330
uniform vec4 color;
out vec4 outputColor;
void main() {
outputColor = color;
}
` + "\x00"
vertices := []float32{
0.0, 0.0, 0.0,
1.0, 0.0, 0.0,
1.0, 1.0, 0.0,
1.0, 1.0, 0.0,
0.0, 1.0, 0.0,
0.0, 0.0, 0.0,
}
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, 3)
glfw.WindowHint(glfw.ContextVersionMinor, 3)
glfw.WindowHint(glfw.OpenGLProfile, glfw.OpenGLCoreProfile)
glfw.WindowHint(glfw.OpenGLForwardCompatible, glfw.True)
window, err := glfw.CreateWindow(width, height, "OpenGL", nil, nil)
if err != nil {
panic(err)
}
window.MakeContextCurrent()
if err := gl.Init(); err != nil {
panic(err)
}
program, err := newProgram(vertexShader, fragmentShader)
if err != nil {
panic(err)
}
gl.UseProgram(program)
projection := mgl32.Ortho2D(0, 800, 0, 600)
projectionUniform := gl.GetUniformLocation(program, gl.Str("projection\x00"))
gl.UniformMatrix4fv(projectionUniform, 1, false, &projection[0])
camera := mgl32.LookAtV(mgl32.Vec3{0, 0, 0.5}, 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])
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(vertices)*4, gl.Ptr(vertices), gl.STATIC_DRAW)
vertAttrib := uint32(gl.GetAttribLocation(program, gl.Str("vert\x00")))
gl.EnableVertexAttribArray(vertAttrib)
gl.VertexAttribPointer(vertAttrib, 3, gl.FLOAT, false, 3*4, gl.PtrOffset(0))
gl.Enable(gl.DEPTH_TEST)
gl.DepthFunc(gl.LESS)
return Context{Window: window, program: program}
}
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()
}
}
func (shader *MVCShader) SetMVC(mat mgl32.Mat4) {
gl.UniformMatrix4fv(shader.mVCHandle, 1, false, &mat[0])
}
func (r *Renderable) Draw(perspective mgl.Mat4, view mgl.Mat4) {
gl.UseProgram(r.Shader)
gl.BindVertexArray(r.Vao)
model := r.GetTransformMat4()
var mvp mgl.Mat4
shaderMvp := getUniformLocation(r.Shader, "MVP_MATRIX")
if shaderMvp >= 0 {
mvp = perspective.Mul4(view).Mul4(model)
gl.UniformMatrix4fv(shaderMvp, 1, false, &mvp[0])
}
shaderMv := getUniformLocation(r.Shader, "MV_MATRIX")
if shaderMv >= 0 {
mv := view.Mul4(model)
gl.UniformMatrix4fv(shaderMv, 1, false, &mv[0])
}
shaderTex0 := getUniformLocation(r.Shader, "DIFFUSE_TEX")
if shaderTex0 >= 0 {
gl.ActiveTexture(gl.TEXTURE0)
gl.BindTexture(gl.TEXTURE_2D, r.Tex0)
gl.Uniform1i(shaderTex0, 0)
}
shaderColor := getUniformLocation(r.Shader, "MATERIAL_DIFFUSE")
if shaderColor >= 0 {
gl.Uniform4f(shaderColor, r.Color[0], r.Color[1], r.Color[2], r.Color[3])
}
shaderTex1 := getUniformLocation(r.Shader, "MATERIAL_TEX_0")
if shaderTex1 >= 0 {
gl.ActiveTexture(gl.TEXTURE0)
gl.BindTexture(gl.TEXTURE_2D, r.Tex0)
gl.Uniform1i(shaderTex1, 0)
}
shaderCameraWorldPos := getUniformLocation(r.Shader, "CAMERA_WORLD_POSITION")
if shaderCameraWorldPos >= 0 {
gl.Uniform3f(shaderCameraWorldPos, -view[12], -view[13], -view[14])
}
shaderPosition := getAttribLocation(r.Shader, "VERTEX_POSITION")
if shaderPosition >= 0 {
gl.BindBuffer(gl.ARRAY_BUFFER, r.VertVBO)
gl.EnableVertexAttribArray(uint32(shaderPosition))
gl.VertexAttribPointer(uint32(shaderPosition), 3, gl.FLOAT, false, 0, gl.PtrOffset(0))
}
shaderNormal := getAttribLocation(r.Shader, "VERTEX_NORMAL")
if shaderNormal >= 0 {
gl.BindBuffer(gl.ARRAY_BUFFER, r.NormsVBO)
gl.EnableVertexAttribArray(uint32(shaderNormal))
gl.VertexAttribPointer(uint32(shaderNormal), 3, gl.FLOAT, false, 0, gl.PtrOffset(0))
}
shaderVertUv := getAttribLocation(r.Shader, "VERTEX_UV_0")
if shaderVertUv >= 0 {
gl.BindBuffer(gl.ARRAY_BUFFER, r.UvVBO)
gl.EnableVertexAttribArray(uint32(shaderVertUv))
gl.VertexAttribPointer(uint32(shaderVertUv), 2, gl.FLOAT, false, 0, gl.PtrOffset(0))
}
gl.BindBuffer(gl.ELEMENT_ARRAY_BUFFER, r.ElementsVBO)
gl.DrawElements(gl.TRIANGLES, int32(r.FaceCount*3), gl.UNSIGNED_INT, gl.PtrOffset(0))
gl.BindVertexArray(0)
}
func (tr *SpriteRenderer) Draw(instances []SpriteConfig) error {
var (
bytesNeeded int
byteoffset int
count int32
data unsafe.Pointer
float float32 = 0
floatSize uint32
i uint32
offset unsafe.Pointer
sprite SpriteConfig
stride int32
)
floatSize = uint32(unsafe.Sizeof(float))
stride = int32(unsafe.Sizeof(sprite))
gl.UseProgram(tr.program)
gl.Uniform1i(tr.textureUnitLoc, 0)
// Instance data binding
gl.BindBuffer(gl.ARRAY_BUFFER, tr.instanceVBO)
count = int32(len(instances))
bytesNeeded = int(stride * count)
data = gl.Ptr(instances)
if bytesNeeded > tr.instanceBytes {
gl.BufferData(gl.ARRAY_BUFFER, bytesNeeded, data, gl.STREAM_DRAW)
tr.instanceBytes = bytesNeeded
} else {
gl.BufferSubData(gl.ARRAY_BUFFER, 0, bytesNeeded, data)
}
gl.EnableVertexAttribArray(tr.translationLoc)
gl.VertexAttribPointer(tr.translationLoc, 3, gl.FLOAT, false, stride, tr.offAttrX)
gl.VertexAttribDivisor(tr.translationLoc, 1)
gl.EnableVertexAttribArray(tr.rotationLoc)
gl.VertexAttribPointer(tr.rotationLoc, 3, gl.FLOAT, false, stride, tr.offAttrRotationX)
gl.VertexAttribDivisor(tr.rotationLoc, 1)
gl.EnableVertexAttribArray(tr.scaleLoc)
gl.VertexAttribPointer(tr.scaleLoc, 3, gl.FLOAT, false, stride, tr.offAttrScaleX)
gl.VertexAttribDivisor(tr.scaleLoc, 1)
gl.EnableVertexAttribArray(tr.colorLoc)
gl.VertexAttribPointer(tr.colorLoc, 4, gl.FLOAT, false, stride, tr.offAttrColor)
gl.VertexAttribDivisor(tr.colorLoc, 1)
for i = 0; i < 4; i++ {
byteoffset = int(i * 4 * floatSize)
offset = gl.PtrOffset(tr.offAttrPointAdj + byteoffset)
gl.EnableVertexAttribArray(tr.pointAdjLoc + i)
gl.VertexAttribPointer(tr.pointAdjLoc+i, 4, gl.FLOAT, false, stride, offset)
gl.VertexAttribDivisor(tr.pointAdjLoc+i, 1)
offset = gl.PtrOffset(tr.offAttrTextureAdj + byteoffset)
gl.EnableVertexAttribArray(tr.textureAdjLoc + i)
gl.VertexAttribPointer(tr.textureAdjLoc+i, 4, gl.FLOAT, false, stride, offset)
gl.VertexAttribDivisor(tr.textureAdjLoc+i, 1)
}
// Projection
gl.UniformMatrix4fv(tr.projectionLoc, 1, false, &tr.Renderer.Camera.Projection[0])
// Actually draw.
gl.DrawArraysInstanced(gl.TRIANGLES, 0, 6, int32(len(instances)))
// Undo instance attr repetition.
gl.VertexAttribDivisor(tr.translationLoc, 0)
gl.VertexAttribDivisor(tr.rotationLoc, 0)
gl.VertexAttribDivisor(tr.scaleLoc, 0)
gl.VertexAttribDivisor(tr.colorLoc, 0)
for i = 0; i < 4; i++ {
gl.VertexAttribDivisor(tr.pointAdjLoc+i, 0)
gl.VertexAttribDivisor(tr.textureAdjLoc+i, 0)
}
gl.BindBuffer(gl.ARRAY_BUFFER, 0)
return nil
}
func (vertexArray VertexArray) SetMVCData(mat mgl32.Mat4) {
gl.UniformMatrix4fv(vertexArray.handleMVC, 1, false, &mat[0])
}
func renderBoard(g *game.Game, fudge float32) bool {
if g.Board == nil {
return false
}
b := g.Board
metrics := newMetrics(g, fudge)
gl.UniformMatrix4fv(projectionViewMatrixUniform, 1, false, &perspectiveProjectionViewMatrix[0])
gl.Uniform3fv(mixColorUniform, 1, &blackColor[0])
globalGrayscale := float32(1)
globalDarkness := float32(0.8)
var boardDarkness float32
gameEase := func(start, change float32) float32 {
return easeOutCubic(g.StateProgress(fudge), start, change)
}
boardEase := func(start, change float32) float32 {
return easeOutCubic(b.StateProgress(fudge), start, change)
}
switch g.State {
case game.GamePlaying:
globalGrayscale = gameEase(1, -1)
globalDarkness = gameEase(0.8, -0.8)
case game.GamePaused:
globalGrayscale = gameEase(0, 1)
globalDarkness = gameEase(0, 0.8)
case game.GameExiting:
globalGrayscale = 1
globalDarkness = gameEase(0.8, 1)
}
switch b.State {
case game.BoardEntering:
boardDarkness = boardEase(1, -1)
case game.BoardExiting:
boardDarkness = boardEase(0, 1)
}
finalDarkness := globalDarkness
if finalDarkness < boardDarkness {
finalDarkness = boardDarkness
}
gl.Uniform1f(mixAmountUniform, finalDarkness)
gl.Uniform1i(textureUniform, int32(boardTexture)-1)
for i := 0; i <= 2; i++ {
gl.Uniform1f(grayscaleUniform, globalGrayscale)
gl.Uniform1f(brightnessUniform, 0)
gl.Uniform1f(alphaUniform, 1)
if i == 0 {
renderSelector(metrics)
}
for y, r := range b.Rings {
for x, c := range r.Cells {
switch i {
case 0: // draw opaque objects
switch c.Block.State {
case game.BlockStatic,
game.BlockSwappingFromLeft,
game.BlockSwappingFromRight,
game.BlockDroppingFromAbove,
game.BlockFlashing:
renderCellBlock(metrics, c, x, y)
case game.BlockCracking, game.BlockCracked:
renderCellFragments(metrics, c, x, y)
}
case 1: // draw transparent objects
switch c.Block.State {
case game.BlockExploding:
renderCellFragments(metrics, c, x, y)
}
renderMarker(metrics, c.Marker, x, y)
}
}
}
}
// Render the spare rings.
// Set brightness to zero for all spare rings.
gl.Uniform1f(brightnessUniform, 0)
for y, r := range b.SpareRings {
// Set grayscale value. First spare rings becomes colored. Rest are gray.
grayscale := float32(1)
if y == 0 {
grayscale = easeInExpo(b.RiseProgress(fudge), 1, -1)
}
if grayscale < globalGrayscale {
grayscale = globalGrayscale
}
gl.Uniform1f(grayscaleUniform, grayscale)
// Set alpha value. Last spare ring fades in. Rest are opaque.
alpha := float32(1)
if y == len(b.SpareRings)-1 {
alpha = easeInExpo(b.RiseProgress(fudge), 0, 1)
}
gl.Uniform1f(alphaUniform, alpha)
// Render the spare rings below the normal rings.
for x, c := range r.Cells {
renderCellBlock(metrics, c, x, y+b.RingCount)
}
}
return true
}
func Init() error {
if err := gl.Init(); err != nil {
return err
}
log.Printf("OpenGL version: %s", gl.GoStr(gl.GetString(gl.VERSION)))
vs, err := asset.String("shader.vert")
if err != nil {
return err
}
fs, err := asset.String("shader.frag")
if err != nil {
return err
}
program, err := createProgram(vs, fs)
if err != nil {
return err
}
gl.UseProgram(program)
var shaderErr error
uniform := func(name string) int32 {
var loc int32
loc, shaderErr = getUniformLocation(program, name)
return loc
}
projectionViewMatrixUniform = uniform("u_projectionViewMatrix")
modelMatrixUniform = uniform("u_modelMatrix")
normalMatrixUniform = uniform("u_normalMatrix")
ambientLightColorUniform = uniform("u_ambientLightColor")
directionalLightColorUniform = uniform("u_directionalLightColor")
directionalVectorUniform = uniform("u_directionalVector")
textureUniform = uniform("u_texture")
grayscaleUniform = uniform("u_grayscale")
brightnessUniform = uniform("u_brightness")
alphaUniform = uniform("u_alpha")
mixColorUniform = uniform("u_mixColor")
mixAmountUniform = uniform("u_mixAmount")
if shaderErr != nil {
return shaderErr
}
vm := newViewMatrix(cameraPosition, targetPosition, up)
nm := vm.inverse().transpose()
gl.UniformMatrix4fv(normalMatrixUniform, 1, false, &nm[0])
gl.Uniform3fv(ambientLightColorUniform, 1, &ambientLightColor[0])
gl.Uniform3fv(directionalLightColorUniform, 1, &directionalLightColor[0])
gl.Uniform3fv(directionalVectorUniform, 1, &directionalVector[0])
SizeCallback = func(width, height int) {
if winWidth == width && winHeight == height {
return
}
log.Printf("window size changed (%dx%d -> %dx%d)", int(winWidth), int(winHeight), width, height)
gl.Viewport(0, 0, int32(width), int32(height))
// Calculate new perspective projection view matrix.
winWidth, winHeight = width, height
fw, fh := float32(width), float32(height)
aspect := fw / fh
fovRadians := float32(math.Pi) / 3
perspectiveProjectionViewMatrix = vm.mult(newPerspectiveMatrix(fovRadians, aspect, 1, 2000))
// Calculate new ortho projection view matrix.
orthoProjectionViewMatrix = newOrthoMatrix(fw, fh, fw /* use width as depth */)
}
if err := initMeshes(); err != nil {
return err
}
if err := initTextures(); err != nil {
return err
}
gl.Enable(gl.CULL_FACE)
gl.CullFace(gl.BACK)
gl.Enable(gl.DEPTH_TEST)
gl.DepthFunc(gl.LESS)
gl.Enable(gl.BLEND)
gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
gl.ClearColor(0, 0, 0, 0)
return nil
}
func (u *Uniform) Mat4(m mgl32.Mat4) {
gl.UniformMatrix4fv(u.location, 1, false, &m[0])
}
func main() {
// init glfw
if err := glfw.Init(); err != nil {
panic(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)
// make an application window
window, err := glfw.CreateWindow(windowWidth, windowHeight, "Transform", nil, nil)
if err != nil {
panic(err)
}
window.MakeContextCurrent()
// init gl
if err := gl.Init(); err != nil {
panic(err)
}
fmt.Println("OpenGL version", gl.GoStr(gl.GetString(gl.VERSION)))
// create vertex & fragment shader
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])
gl.BindFragDataLocation(program, 0, gl.Str("vert\x00"))
points := []float32{
-0.9, -0.9, -0.9,
0.9, -0.9, -0.9,
0.9, -0.9, 0.9,
-0.9, -0.9, 0.9,
-0.9, 0.9, -0.9,
0.9, 0.9, -0.9,
0.9, 0.9, 0.9,
-0.9, 0.9, 0.9,
}
vertices := []uint32{
0, 1,
1, 2,
2, 3,
3, 0,
0, 4,
1, 5,
2, 6,
3, 7,
4, 5,
5, 6,
6, 7,
7, 4,
}
// configure the vertex data
var vao uint32
gl.GenVertexArrays(1, &vao)
gl.BindVertexArray(vao)
defer gl.BindVertexArray(0)
var vbo uint32
gl.GenBuffers(1, &vbo)
gl.BindBuffer(gl.ARRAY_BUFFER, vbo)
gl.BufferData(gl.ARRAY_BUFFER, len(points)*4, gl.Ptr(points), gl.STATIC_DRAW)
var ibo uint32
gl.GenBuffers(1, &ibo)
gl.BindBuffer(gl.ELEMENT_ARRAY_BUFFER, ibo)
gl.BufferData(gl.ELEMENT_ARRAY_BUFFER, len(vertices)*4, gl.Ptr(vertices), gl.STATIC_DRAW)
vertAttrib := uint32(gl.GetAttribLocation(program, gl.Str("vert\x00")))
gl.EnableVertexAttribArray(vertAttrib)
gl.VertexAttribPointer(vertAttrib, 3, gl.FLOAT, false, 3*4, gl.PtrOffset(0))
// global settings
gl.Enable(gl.DEPTH_TEST)
gl.DepthFunc(gl.LESS)
gl.ClearColor(0.0, 0.0, 0.0, 1.0)
angleX := 0.0
angleY := 0.0
angleZ := 0.0
previousTime := glfw.GetTime()
for !window.ShouldClose() {
gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
time := glfw.GetTime()
elapsed := time - previousTime
previousTime = time
angleX += math.Sin((elapsed / period) * math.Pi * 2.0)
angleY += math.Sin((elapsed / period) / 6.0 * math.Pi * 2.0)
angleZ += math.Sin((elapsed / period) / 3.0 * math.Pi * 2.0)
model = mgl32.HomogRotate3DY(float32(angleY)).Mul4(mgl32.HomogRotate3DX(float32(angleX))).Mul4(mgl32.HomogRotate3DZ(float32(angleZ)))
gl.UseProgram(program)
gl.UniformMatrix4fv(modelUniform, 1, false, &model[0])
gl.BindVertexArray(vao)
gl.DrawElements(gl.LINES, int32(len(vertices)), gl.UNSIGNED_INT, gl.PtrOffset(0))
window.SwapBuffers()
glfw.PollEvents()
}
}
func renderSelector(metrics *metrics) {
gl.UniformMatrix4fv(modelMatrixUniform, 1, false, &metrics.selectorMatrix[0])
selectorMesh.drawElements()
}
func renderCellFragments(metrics *metrics, c *game.Cell, x, y int) {
const (
nw = iota
ne
se
sw
)
render := func(sc, rx, ry, rz float32, dir int) {
m := newScaleMatrix(sc, sc, sc)
m = m.mult(newTranslationMatrix(rx, ry, rz))
m = m.mult(metrics.blockMatrix(c.Block, x, y))
gl.UniformMatrix4fv(modelMatrixUniform, 1, false, &m[0])
fragmentMeshes[c.Block.Color][dir].drawElements()
}
ease := func(start, change float32) float32 {
return easeOutCubic(c.Block.StateProgress(metrics.fudge), start, change)
}
var bv float32
var av float32
switch c.Block.State {
case game.BlockCracking, game.BlockCracked:
av = 1
case game.BlockExploding:
bv = ease(0, 1)
av = ease(1, -1)
}
gl.Uniform1f(brightnessUniform, bv)
gl.Uniform1f(alphaUniform, av)
const (
maxCrack = 0.03
maxExpand = 0.02
)
var rs float32
var rt float32
var j float32
switch c.Block.State {
case game.BlockCracking:
rs = ease(1, 1+maxExpand)
rt = ease(0, maxCrack)
j = pulse(c.Block.StateProgress(metrics.fudge), 0, 0.5, 1.5)
case game.BlockCracked:
rs = 1
rt = maxCrack
case game.BlockExploding:
rs = ease(1, -1)
rt = ease(maxCrack, math.Pi*0.75)
}
const szt = 0.5 // starting z translation since model is 0.5 in depth
wx, ex := -rt, rt
fz, bz := rt+szt, -rt-szt
const amp = 1
ny := rt + amp*float32(math.Sin(float64(rt)))
sy := -rt + amp*(float32(math.Cos(float64(-rt)))-1)
render(rs, wx+j, ny+j, fz, nw) // front north west
render(rs, ex+j, ny+j, fz, ne) // front north east
render(rs, wx+j, ny+j, bz, nw) // back north west
render(rs, ex+j, ny+j, bz, ne) // back north east
render(rs, wx+j, sy+j, fz, sw) // front south west
render(rs, ex+j, sy+j, fz, se) // front south east
render(rs, wx+j, sy+j, bz, sw) // back south west
render(rs, ex+j, sy+j, bz, se) // back south east
}