func onPaint(sz size.Event) {
gl.ClearColor(rgb(156), rgb(39), rgb(176), 1)
gl.Clear(gl.COLOR_BUFFER_BIT)
var rotationMatrix = []float32{
f32.Cos(-alpha), -f32.Sin(-alpha), 0.0,
f32.Sin(-alpha), f32.Cos(-alpha), 0.0,
0.0, 0.0, 1.0,
}
gl.UseProgram(program)
// setting color
gl.Uniform4f(color, rgb(255), rgb(255), rgb(255), 1)
gl.UniformMatrix3fv(matrixId, rotationMatrix)
gl.Uniform1f(resolutionId, resIndex)
gl.BindBuffer(gl.ARRAY_BUFFER, swasBuffer)
gl.EnableVertexAttribArray(position)
gl.VertexAttribPointer(position, 3, gl.FLOAT, false, 0, 0)
gl.DrawArrays(gl.LINES, 0, 16)
gl.DisableVertexAttribArray(position)
gl.UseProgram(texProgram)
// setting color
gl.Uniform4f(color2, rgb(130), rgb(50), rgb(80), 1)
gl.Uniform1f(resolutionId2, resIndex)
gl.UniformMatrix3fv(matrixId2, rotationMatrix)
gl.BindBuffer(gl.ARRAY_BUFFER, quadBuffer)
gl.EnableVertexAttribArray(position2)
gl.VertexAttribPointer(position2, 3, gl.FLOAT, false, 0, 0)
gl.BindBuffer(gl.ARRAY_BUFFER, quadTexBuffer)
gl.EnableVertexAttribArray(textureCoords)
gl.VertexAttribPointer(textureCoords, 2, gl.FLOAT, false, 0, 0)
gl.Uniform1i(gl.GetUniformLocation(texProgram, "myTexture"), 0)
gl.ActiveTexture(gl.TEXTURE0)
gl.BindTexture(gl.TEXTURE_2D, textureId)
gl.DrawArrays(gl.TRIANGLES, 0, 6)
gl.DisableVertexAttribArray(position2)
gl.DisableVertexAttribArray(textureCoords)
if spin == true {
alpha += 0.1
}
if alpha >= 360 {
alpha = 0.0
}
}
func draw() {
if program.Value == 0 {
initGL()
initCL()
}
if numPlatforms == 0 {
gl.ClearColor(1, 0, 0, 1)
} else {
gl.ClearColor(0, 1, 0, 1)
}
gl.Clear(gl.COLOR_BUFFER_BIT)
gl.UseProgram(program)
blue += 0.01
if blue > 1 {
blue = 0
}
gl.Uniform4f(color, 0, 0, blue, 1)
gl.Uniform2f(offset, float32(touchLoc.X/geom.Width), float32(touchLoc.Y/geom.Height))
gl.BindBuffer(gl.ARRAY_BUFFER, buf)
gl.EnableVertexAttribArray(position)
gl.VertexAttribPointer(position, coordsPerVertex, gl.FLOAT, false, 0, 0)
gl.DrawArrays(gl.TRIANGLES, 0, vertexCount)
gl.DisableVertexAttribArray(position)
debug.DrawFPS()
}
func onPaint(c size.Event) {
//清场
gl.ClearColor(1, 1, 1, 1) //设置背景颜色
gl.Clear(gl.COLOR_BUFFER_BIT)
//使用program
gl.UseProgram(program)
gl.Uniform4f(color, 0, 0.5, 0.8, 1) //设置color对象值,设置4个浮点数.
//offset有两个值X,Y,窗口左上角为(0,0),右下角为(1,1)
//gl.Uniform4f(offset,5.0,1.0,1.0,1.0 )
//gl.Uniform2f(offset,offsetx,offsety )//为2参数的uniform变量赋值
//log.Println("offset:",offsetx,offsety, 0, 0)
gl.UniformMatrix4fv(scan, []float32{
float32(touchLoc.X/c.WidthPt*4 - 2), 0, 0, 0,
0, float32(touchLoc.Y/c.HeightPt*4 - 2), 0, 0,
0, 0, 0, 0,
0, 0, 0, 1,
})
gl.BindBuffer(gl.ARRAY_BUFFER, buf)
gl.EnableVertexAttribArray(position)
/*glVertexAttribPointer 指定了渲染时索引值为 index 的顶点属性数组的数据格式和位置。调用gl.vertexAttribPointer()方法，把顶点着色器中某个属性相对应的通用属性索引连接到绑定的webGLBUffer对象上。
index 指定要修改的顶点属性的索引值
size 指定每个顶点属性的组件数量。必须为1、2、3或者4。初始值为4。（如position是由3个（x,y,z）组成，而颜色是4个（r,g,b,a））
type 指定数组中每个组件的数据类型。可用的符号常量有GL_BYTE, GL_UNSIGNED_BYTE, GL_SHORT,GL_UNSIGNED_SHORT, GL_FIXED, 和 GL_FLOAT，初始值为GL_FLOAT。
normalized 指定当被访问时，固定点数据值是否应该被归一化（GL_TRUE）或者直接转换为固定点值（GL_FALSE）。
stride 指定连续顶点属性之间的偏移量。如果为0，那么顶点属性会被理解为：它们是紧密排列在一起的。初始值为0。
pointer 指定第一个组件在数组的第一个顶点属性中的偏移量。该数组与GL_ARRAY_BUFFER绑定，储存于缓冲区中。初始值为0；
*/
gl.VertexAttribPointer(position, coordsPerVertex, gl.FLOAT, false, 0, 0) //更新position值
gl.DrawArrays(gl.TRIANGLES, 0, vertexCount)
gl.DisableVertexAttribArray(position)
debug.DrawFPS(c)
}
func onPaint(c size.Event) {
gl.ClearColor(0, 0.3, 0.3, 1)
gl.Clear(gl.COLOR_BUFFER_BIT)
gl.UseProgram(program)
green += direction
if green > 1 {
green = 1
direction = -direction
}
if green < 0.4 {
green = 0.4
direction = -direction
}
gl.Uniform4f(color, 0, green, 0, 1)
gl.Uniform2f(offset, touchX/float32(c.WidthPx), touchY/float32(c.HeightPx))
gl.BindBuffer(gl.ARRAY_BUFFER, buf)
gl.BufferData(gl.ARRAY_BUFFER, triangleData, gl.STATIC_DRAW) // ?
gl.EnableVertexAttribArray(position)
gl.VertexAttribPointer(position, coordsPerVertex, gl.FLOAT, false, 0, 0)
gl.DrawArrays(gl.TRIANGLES, 0, vertexCount)
gl.DisableVertexAttribArray(position)
debug.DrawFPS(c)
}
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)
}
func onPaint(c config.Event) {
gl.ClearColor(1, 1, 1, 1)
gl.Clear(gl.COLOR_BUFFER_BIT)
gl.UseProgram(program)
gl.Uniform4f(color, 0.3, 0.3, 0.3, 1) // color
// position
x := float32(touchLoc.X / c.Width)
y := float32(touchLoc.Y / c.Height)
gl.Uniform2f(offset, x, y)
gl.BindBuffer(gl.ARRAY_BUFFER, buf)
gl.EnableVertexAttribArray(position)
gl.VertexAttribPointer(position, 2, gl.FLOAT, false, 0, 0)
gl.DrawArrays(gl.TRIANGLE_STRIP, 0, 4)
gl.DisableVertexAttribArray(position)
}
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)
}
func onPaint(sz size.Event) {
gl.ClearColor(1, 0, 0, 1)
gl.Clear(gl.COLOR_BUFFER_BIT)
gl.UseProgram(program)
green += 0.01
if green > 1 {
green = 0
}
gl.Uniform4f(color, 0, green, 0, 1)
gl.Uniform2f(offset, touchX/float32(sz.WidthPx), touchY/float32(sz.HeightPx))
gl.BindBuffer(gl.ARRAY_BUFFER, buf)
gl.EnableVertexAttribArray(position)
gl.VertexAttribPointer(position, coordsPerVertex, gl.FLOAT, false, 0, 0)
gl.DrawArrays(gl.TRIANGLES, 0, vertexCount)
gl.DisableVertexAttribArray(position)
debug.DrawFPS(sz)
}
func onDraw(c config.Event) {
gl.ClearColor(1, 0, 0, 1)
gl.Clear(gl.COLOR_BUFFER_BIT)
gl.UseProgram(program)
green += 0.01
if green > 1 {
green = 0
}
gl.Uniform4f(color, 0, green, 0, 1)
gl.Uniform2f(offset, float32(touchLoc.X/c.Width), float32(touchLoc.Y/c.Height))
gl.BindBuffer(gl.ARRAY_BUFFER, buf)
gl.EnableVertexAttribArray(position)
gl.VertexAttribPointer(position, coordsPerVertex, gl.FLOAT, false, 0, 0)
gl.DrawArrays(gl.TRIANGLES, 0, vertexCount)
gl.DisableVertexAttribArray(position)
debug.DrawFPS(c)
}
func (w *windowImpl) Fill(dr image.Rectangle, src color.Color, op draw.Op) {
if !gl.IsProgram(w.s.fill.program) {
p, err := compileProgram(fillVertexSrc, fillFragmentSrc)
if err != nil {
// TODO: initialize this somewhere else we can better handle the error.
panic(err.Error())
}
w.s.fill.program = p
w.s.fill.pos = gl.GetAttribLocation(p, "pos")
w.s.fill.mvp = gl.GetUniformLocation(p, "mvp")
w.s.fill.color = gl.GetUniformLocation(p, "color")
w.s.fill.quadXY = gl.CreateBuffer()
gl.BindBuffer(gl.ARRAY_BUFFER, w.s.fill.quadXY)
gl.BufferData(gl.ARRAY_BUFFER, quadXYCoords, gl.STATIC_DRAW)
}
gl.UseProgram(w.s.fill.program)
writeAff3(w.s.fill.mvp, w.vertexAff3(dr))
r, g, b, a := src.RGBA()
gl.Uniform4f(
w.s.fill.color,
float32(r)/65535,
float32(g)/65535,
float32(b)/65535,
float32(a)/65535,
)
gl.BindBuffer(gl.ARRAY_BUFFER, w.s.fill.quadXY)
gl.EnableVertexAttribArray(w.s.fill.pos)
gl.VertexAttribPointer(w.s.fill.pos, 2, gl.FLOAT, false, 0, 0)
gl.DrawArrays(gl.TRIANGLE_STRIP, 0, 4)
gl.DisableVertexAttribArray(w.s.fill.pos)
}
func drawKeys() {
gl.UseProgram(program)
projection.WriteMat4(&projmat)
iPlaying := []int{}
playing := []ratio{}
amps := []float64{}
for i, k := range keys {
k := k.base()
if k.voice != nil && !k.voice.Done() {
iPlaying = append(iPlaying, i)
playing = append(playing, k.ratio)
amps = append(amps, k.voice.amp())
}
}
complexities := make([]float64, len(keys))
minComplexity := math.MaxFloat64
for i, k := range keys {
k := k.base()
c := -1.0
for j, iPlaying := range iPlaying {
if i == iPlaying {
a := amps[j]
amps[j] = 1
c = complexity(playing, amps)
amps[j] = a
break
}
}
if c == -1 {
c = complexity(append(playing, k.ratio), append(amps, 1))
}
complexities[i] = c
if c < minComplexity {
minComplexity = c
}
}
data := []float32{}
pointsizedata := []float32{}
for i, k := range keys {
k := k.base()
k.y = 1 - math.Exp2(-float64(complexities[i]-minComplexity)/4)
k.size = math.Exp2(-float64(complexities[i])/4) * float64(geom.Width) * float64(geom.PixelsPerPt) / 4
data = append(data, float32(k.pitch), float32(k.y))
pointsizedata = append(pointsizedata, float32(k.size))
}
gl.BindBuffer(gl.ARRAY_BUFFER, positionbuf)
gl.BufferData(gl.ARRAY_BUFFER, f32.Bytes(binary.LittleEndian, data...), gl.DYNAMIC_DRAW)
gl.BindBuffer(gl.ARRAY_BUFFER, pointsizebuf)
gl.BufferData(gl.ARRAY_BUFFER, f32.Bytes(binary.LittleEndian, pointsizedata...), gl.DYNAMIC_DRAW)
gl.EnableVertexAttribArray(position)
gl.EnableVertexAttribArray(pointsize)
gl.Uniform4f(color, 1, 1, 1, 1)
gl.BindBuffer(gl.ARRAY_BUFFER, positionbuf)
gl.VertexAttribPointer(position, 2, gl.FLOAT, false, 0, 0)
gl.BindBuffer(gl.ARRAY_BUFFER, pointsizebuf)
gl.VertexAttribPointer(pointsize, 1, gl.FLOAT, false, 0, 0)
gl.DrawArrays(gl.POINTS, 0, len(keys))
gl.DisableVertexAttribArray(position)
gl.DisableVertexAttribArray(pointsize)
}