func (this *World) PortalTransform(pos1, pos2 mgl.Vec4) mgl.Mat4 {
portal := this.NearestPortal(pos1)
m := portal.View()
pos1 = m.Mul4x1(pos1)
pos2 = m.Mul4x1(pos2)
n := portal.Normal
a := n.Dot(pos1)
b := n.Dot(pos2)
var portalPassed bool
if a*b < 0 {
c := a / (a - b)
pos3 := pos1.Mul(c).Add(pos2.Mul(1 - c))
portalPassed = -1 < pos3[0] && pos3[0] < 1 && -1 < pos3[1] && pos3[1] < 1
} else {
portalPassed = false
}
if portalPassed {
return portal.Transform()
} else {
return mgl.Ident4()
}
}
func NewWorldRenderer(window *sdl.Window, w *gamestate.World) *WorldRenderer {
width, height := window.GetSize()
return &WorldRenderer{
Proj: mgl.Perspective(90, float32(width)/float32(height), 0.3, 1000),
View: mgl.Ident4(),
ClippingPlane_ws: mgl.Vec4{1, 0, 0, -1000000},
Textures: NewTextures(w.HeightMap),
HeightMapRenderer: NewHeightMapRenderer(),
WaterRendererA: NewSurfaceWaterRenderer(),
WaterRendererB: NewDebugWaterRenderer(),
MeshRenderer: NewMeshRenderer(),
PortalRenderer: NewPortalRenderer(),
TreeRenderer: NewTreeRenderer(),
SkyboxRenderer: NewSkyboxRenderer(),
Skybox: &Skybox{},
ParticleSystem: particles.NewParticleSystem(w, 10000, mgl.Vec3{32, 32, 32}, 1, 250),
Framebuffer: [2]*FrameBuffer{NewFrameBuffer(window.GetSize()), NewFrameBuffer(window.GetSize())},
ScreenQuad: &ScreenQuad{},
ScreenQuadRenderer: NewScreenQuadRenderer(),
DebugRenderer: NewLineRenderer(),
MaxRecursion: 1,
}
}
func (this *HeightMap) Model() mgl.Mat4 {
return mgl.Ident4()
}
func (this *Skybox) Model() mgl.Mat4 {
return mgl.Ident4()
}
func (this *Water) Model() mgl.Mat4 {
return mgl.Ident4()
}
func (this *ScreenQuad) Model() mgl.Mat4 {
return mgl.Ident4()
}