Method RenderSetup

light/directional.go:68–83

RenderSetup is called by the engine before rendering the scene

(gs *gls.GLS, rinfo *core.RenderInfo, idx int)

// RenderSetup is called by the engine before rendering the scene
func (ld *Directional) RenderSetup(gs *gls.GLS, rinfo *core.RenderInfo, idx int) {

	// Calculates light position in camera coordinates and updates uniform
	var pos math32.Vector3
	ld.WorldPosition(&pos)
	pos4 := math32.Vector4{pos.X, pos.Y, pos.Z, 0.0}
	pos4.ApplyMatrix4(&rinfo.ViewMatrix)
	ld.udata.position.X = pos4.X
	ld.udata.position.Y = pos4.Y
	ld.udata.position.Z = pos4.Z

	// Transfer uniform data
	const vec3count = 2
	location := ld.uni.LocationIdx(gs, vec3count*int32(idx))
	gs.Uniform3fv(location, vec3count, &ld.udata.color.R)
}