func (c *Context) UniformMatrix4fv(location *UniformLocation, transpose bool, value []float32) {
// TODO: count value of 1 is currently hardcoded.
// Perhaps it should be len(value) / 16 or something else?
// In OpenGL 2.1 it is a manually supplied parameter, but WebGL does not have it.
// Not sure if WebGL automatically deduces it and supports count values greater than 1, or if 1 is always assumed.
gl.UniformMatrix4fv(location.int32, 1, transpose, &value[0])
}
func (c *Context) UniformFloats(p Program, location string, v []float32) {
l := int32(GetUniformLocation(c, p, location))
switch len(v) {
case 4:
gl.Uniform4fv(l, 1, (*float32)(gl.Ptr(v)))
case 16:
gl.UniformMatrix4fv(l, 1, false, (*float32)(gl.Ptr(v)))
default:
panic("not reach")
}
}
func (c *Context) UniformFloats(p Program, location string, v []float32) {
_ = c.runOnContextThread(func() error {
l := int32(c.locationCache.GetUniformLocation(c, p, location))
switch len(v) {
case 4:
gl.Uniform4fv(l, 1, (*float32)(gl.Ptr(v)))
case 16:
gl.UniformMatrix4fv(l, 1, false, (*float32)(gl.Ptr(v)))
default:
panic("not reach")
}
return nil
})
}
// UniformMatrix4fv writes 4x4 matrices. Each matrix uses 16
// float32 values, so the number of matrices written is len(src)/16.
//
// Each matrix must be supplied in column major order.
//
// http://www.khronos.org/opengles/sdk/docs/man3/html/glUniform.xhtml
func UniformMatrix4fv(dst Uniform, src []float32) {
gl.UniformMatrix4fv(dst.Value, int32(len(src)/(4*4)), false, &src[0])
}
func (s *Shader) setUniformM(uniformName string, value Matrix4f) {
floats := value.asArray()
gl.UniformMatrix4fv(s.uniforms[uniformName], 1, true, &floats[0])
}