// CreateProgram creates an OpenGL shader program from the
// passed shader sources. Panics if the shader is invalid.
func CreateProgram(vertex, fragment string) gl.Program {
program := gl.CreateProgram()
v := gl.CreateShader(gl.VertexShader)
v.Source(vertex)
v.Compile()
if v.Parameter(gl.CompileStatus) == 0 {
panic(v.InfoLog())
} else {
log := v.InfoLog()
if len(log) > 0 {
fmt.Println(log)
}
}
f := gl.CreateShader(gl.FragmentShader)
f.Source(fragment)
f.Compile()
if f.Parameter(gl.CompileStatus) == 0 {
panic(f.InfoLog())
} else {
log := f.InfoLog()
if len(log) > 0 {
fmt.Println(log)
}
}
program.AttachShader(v)
program.AttachShader(f)
program.Link()
program.Use()
return program
}
func (c *cloudState) init() {
program := gl.CreateProgram()
v := gl.CreateShader(gl.VertexShader)
v.Source(glsl.Get("cloud_vertex"))
v.Compile()
if v.Parameter(gl.CompileStatus) == 0 {
panic(v.InfoLog())
} else {
log := v.InfoLog()
if len(log) > 0 {
fmt.Println(log)
}
}
g := gl.CreateShader(gl.GeometryShader)
g.Source(glsl.Get("cloud_geo"))
g.Compile()
if g.Parameter(gl.CompileStatus) == 0 {
panic(g.InfoLog())
} else {
log := g.InfoLog()
if len(log) > 0 {
fmt.Println(log)
}
}
f := gl.CreateShader(gl.FragmentShader)
f.Source(glsl.Get("cloud_fragment"))
f.Compile()
if f.Parameter(gl.CompileStatus) == 0 {
panic(f.InfoLog())
} else {
log := f.InfoLog()
if len(log) > 0 {
fmt.Println(log)
}
}
program.AttachShader(v)
program.AttachShader(g)
program.AttachShader(f)
program.Link()
program.Use()
c.program = program
InitStruct(&c.shader, c.program)
c.array = gl.CreateVertexArray()
c.array.Bind()
c.buffer = gl.CreateBuffer()
c.buffer.Bind(gl.ArrayBuffer)
c.shader.Position.Enable()
c.shader.Position.Pointer(3, gl.Float, false, 12, 0)
data := builder.New(builder.Float, builder.Float, builder.Float)
for x := -160; x < 160; x++ {
for y := -160; y < 160; y++ {
data.Float(float32(x))
data.Float(128)
data.Float(float32(y))
c.numPoints++
}
}
c.buffer.Data(data.Data(), gl.StaticDraw)
c.texture = gl.CreateTexture()
c.texture.Bind(gl.Texture2D)
c.texture.Image2D(0, 512, 512, gl.Red, gl.UnsignedByte, c.data)
c.texture.Parameter(gl.TextureMinFilter, gl.Nearest)
c.texture.Parameter(gl.TextureMagFilter, gl.Nearest)
}