Method RenderSetup

geometry/morph.go:189–212

RenderSetup is called by the renderer before drawing the geometry.

(gs *gls.GLS)

// RenderSetup is called by the renderer before drawing the geometry.
func (mg *MorphGeometry) RenderSetup(gs *gls.GLS) {

	mg.baseGeometry.RenderSetup(gs)

	// Sort weights and find top 8 morph targets with largest current weight (8 is the max sent to shader)
	activeMorphTargets, activeWeights := mg.ActiveMorphTargets()

	// If the morph geometry has more targets than the shader supports we need to update attribute names
	// as weights change - we only send the top morph targets with highest weights
	if len(mg.targets) > MaxActiveMorphTargets {
		mg.UpdateTargetAttributes(activeMorphTargets)
	}

	// Transfer morphed geometry VBOs
	for _, mt := range activeMorphTargets {
		for _, vbo := range mt.VBOs() {
			vbo.Transfer(gs)
		}
	}

	// Transfer active weights uniform
	location := mg.uniWeights.Location(gs)
	gs.Uniform1fv(location, int32(len(activeWeights)), &activeWeights[0])
}