示例#1
0
文件: shader.go 项目: dgthunder/glop
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
}
示例#2
0
文件: effect.go 项目: velovix/paunch
// 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
}