func SetUniform4F(shader, variable string, vs []float32) error {
prog, ok := shader_progs[shader]
if !ok {
return shaderError(fmt.Sprintf("Tried to set a uniform in an unknown shader '%s'", shader))
}
bvariable := []byte(fmt.Sprintf("%s\x00", variable))
loc := gl.GetUniformLocation(prog, (*gl.Char)(unsafe.Pointer(&bvariable[0])))
gl.Uniform4f(loc, gl.Float(vs[0]), gl.Float(vs[1]), gl.Float(vs[2]), gl.Float(vs[3]))
return nil
}
// SetVariable4f sets a specified variable to the four supplied integers to
// be passed into an effect.
func (effect *Effect) SetVariable4f(variable string, val1 float32, val2 float32, val3 float32, val4 float32) error {
var currEffect gl.Int
gl.GetIntegerv(gl.CURRENT_PROGRAM, &currEffect)
if gl.Uint(currEffect) != effect.program {
return errors.New("effect is not currently in use")
}
effect.checkUniformVariable(variable)
gl.Uniform4f(effect.uniforms[variable], gl.Float(val1), gl.Float(val2), gl.Float(val3), gl.Float(val4))
return nil
}