Method Draw

common/render_shaders_blendmap.go:295–371

(ren *RenderComponent, space *SpaceComponent)

}

func (s *blendmapShader) Draw(ren *RenderComponent, space *SpaceComponent) {
	bm, ok := ren.Drawable.(Blendmap)
	if !ok {
		panic("only blendmap drawables are supported by blendmap shader.")
	}
	if bm.TexturePack == nil || bm.TexturePack.Fallback == nil {
		panic("No Textures.")
	}

	if s.lastTexturePack != bm.TexturePack {
		s.flush()
		s.bindTexturePack(bm.TexturePack)
		if s.lastTexture == bm.Texture() {
			// if its a different texture we will update the scale with the texture.
			s.updateScale(bm)
		}
		s.lastTexturePack = bm.TexturePack
	}

	if s.lastTexture != ren.Drawable.Texture() {
		s.flush()

		engo.Gl.BindTexture(engo.Gl.TEXTURE_2D, ren.Drawable.Texture())
		s.updateScale(bm)

		s.lastTexture = ren.Drawable.Texture()
	} else if s.idx == len(s.vertices) {
		s.flush()
	}

	if s.lastRepeating != ren.Repeat {
		s.flush()
		var val int
		switch ren.Repeat {
		case NoRepeat:
			val = engo.Gl.CLAMP_TO_EDGE
		case ClampToEdge:
			val = engo.Gl.CLAMP_TO_EDGE
		case ClampToBorder:
			val = engo.Gl.CLAMP_TO_EDGE
		case Repeat:
			val = engo.Gl.REPEAT
		case MirroredRepeat:
			val = engo.Gl.MIRRORED_REPEAT
		}
		engo.Gl.TexParameteri(engo.Gl.TEXTURE_2D, engo.Gl.TEXTURE_WRAP_S, val)
		engo.Gl.TexParameteri(engo.Gl.TEXTURE_2D, engo.Gl.TEXTURE_WRAP_T, val)
	}

	if s.lastMagFilter != ren.magFilter {
		s.flush()
		var val int
		switch ren.magFilter {
		case FilterNearest:
			val = engo.Gl.NEAREST
		case FilterLinear:
			val = engo.Gl.LINEAR
		}