func (s *StencilOp) Disable() *StencilOp {
gl.Disable(gl.STENCIL_TEST)
s.Draw()
s.Depth()
s.DepthMask()
s.DepthLT()
return s
}
func (s *StencilOp) NoDepth() *StencilOp {
gl.Disable(gl.DEPTH_TEST)
return s
}
func (r *Receiver) DrawPortalScene(mv glm.Mat4d, stencilLevel int, depth int) {
s := gtk.Stencil
if depth == 0 {
if stencilLevel > 0 {
gl.Enable(gl.CLIP_DISTANCE0)
}
s.Enable().Mask(stencilLevel)
r.DrawModel(mv, r.Data.Scene, false)
s.Disable()
gl.Disable(gl.CLIP_DISTANCE0)
} else {
s.Enable().Mask(stencilLevel).NoDraw()
r.DrawModel(mv, r.Data.Scene, false)
s.DepthLE().Increment()
gl.Enable(gl.CULL_FACE)
r.DrawModel(mv, r.Data.Portal, false)
if r.Constants.Debug {
r.DrawModel(mv, r.Data.Portal, true)
}
gl.Disable(gl.CULL_FACE)
s.Draw().Keep()
if stencilLevel > 0 {
gl.Enable(gl.CLIP_DISTANCE0)
}
r.DrawModel(mv, r.Data.Scene, false)
if r.Constants.Debug {
gl.Uniform1f(r.SceneLoc.Glow, 1)
s.Mask(stencilLevel + 1)
r.DrawModel(mv, r.Data.Portal, true)
gl.Uniform1f(r.SceneLoc.Glow, 0)
}
gl.Disable(gl.CLIP_DISTANCE0)
//scene drawn at stencil level
//portal are at level 1
r.StepDown(stencilLevel + 1)
r.Shaders.UseProgram(PROGRAM_SCENE)
s.Enable().Depth().DepthLE().Mask(stencilLevel)
//scene is at stencil level
for i, portal := range r.Portals {
s.NoDraw().Increment()
gl.UniformMatrix4fv(r.SceneLoc.Worldview, 1, gl.FALSE, gtk.MatArray(mv))
gl.Enable(gl.CULL_FACE)
r.DrawGeometry(r.Data.Portal.Geometry[i], r.SceneLoc.Position, false)
gl.Disable(gl.CULL_FACE)
s.Draw().Keep()
//need to clear the depth buffer on stencil level1
r.Shaders.UseProgram(PROGRAM_FILL)
s.NoDraw().DepthAlways().Mask(stencilLevel + 1)
// color := gtk.DebugPallet.Pick(i)
// gl.Uniform4fv(r.FillLoc.Color, 1, &color[0])
r.DrawGeometry(r.Data.Fill, r.FillLoc.Position, false)
r.Shaders.UseProgram(PROGRAM_SCENE)
s.Enable().Depth().DepthLE().Mask(stencilLevel)
gl.UniformMatrix4fv(r.SceneLoc.Portalview, 1, gl.FALSE, gtk.MatArray(portal.Portalview))
w1 := mv.Mul4(portal.Transform)
r.DrawPortalScene(w1, stencilLevel+1, depth-1)
r.StepDown(stencilLevel + 1)
r.Shaders.UseProgram(PROGRAM_SCENE)
s.Enable().Depth().DepthLE().Mask(stencilLevel)
}
s.Disable()
}
}