func newProgram() gl.Program {
vs := `
uniform float[] foo;
attribute int bar;
void main()
{
gl_Position = gl_Vertex * foo[0] * bar;
}`
fs := `
void main()
{
gl_FragColor = vec4(1.0);
}`
// vertex shader
vshader := gl.CreateShader(gl.VERTEX_SHADER)
vshader.Source(vs)
vshader.Compile()
if vshader.Get(gl.COMPILE_STATUS) != gl.TRUE {
panic("vertex shader error: " + vshader.GetInfoLog())
}
// fragment shader
fshader := gl.CreateShader(gl.FRAGMENT_SHADER)
fshader.Source(fs)
fshader.Compile()
if fshader.Get(gl.COMPILE_STATUS) != gl.TRUE {
panic("fragment shader error: " + fshader.GetInfoLog())
}
// program
prg := gl.CreateProgram()
prg.AttachShader(vshader)
prg.AttachShader(fshader)
prg.Link()
if prg.Get(gl.LINK_STATUS) != gl.TRUE {
panic("linker error: " + prg.GetInfoLog())
}
prg.Use()
return prg
}
func initShaders() {
// Compile vertex shader
vshader := gl.CreateShader(gl.VERTEX_SHADER)
vshader.Source(vertexShaderSrc)
vshader.Compile()
if vshader.Get(gl.COMPILE_STATUS) != gl.TRUE {
panic("vertex shader compile error: " + vshader.GetInfoLog())
}
// Compile fragment shader
fshader := gl.CreateShader(gl.FRAGMENT_SHADER)
fragSrc, err := readShader("vox.glsl")
if err != nil {
panic(err)
}
fshader.Source(fragSrc)
fshader.Compile()
if fshader.Get(gl.COMPILE_STATUS) != gl.TRUE {
panic("fragment shader compile error: " + fshader.GetInfoLog())
}
// Link program
prg = gl.CreateProgram()
prg.AttachShader(vshader)
prg.AttachShader(fshader)
prg.Link()
if prg.Get(gl.LINK_STATUS) != gl.TRUE {
panic("linker error: " + prg.GetInfoLog())
}
fmt.Println(prg.GetInfoLog())
prg.Use()
}