func ExampleRebase() {
parent1 := NewTransformStack()
scale := mgl64.Scale3D(2, 2, 2)
rot := mgl64.HomogRotate3DY(mgl64.DegToRad(90))
trans := mgl64.Translate3D(5, 5, 5)
parent1.Push(trans)
parent1.Push(rot)
parent1.Push(scale)
parent2 := parent1.Copy()
trans2 := mgl64.Translate3D(1, 1, 1)
rot2 := mgl64.HomogRotate3DX(mgl64.DegToRad(45))
parent1.Push(trans2)
parent1.Push(rot2)
// Replay the pushes the changes from parent1 after the copy onto parent2, as if
// they had been done on parent2 instead
parent2, err := Rebase(parent1, 4, parent2)
if err != nil {
panic(err)
}
// Now parent2 and parent 1 should be the same!
fmt.Println(parent2.Peek().ApproxEqualThreshold(parent1.Peek(), 1e-4))
// Output: true
}
func TestStackMultiPush(t *testing.T) {
stack := NewTransformStack()
scale := mgl64.Scale3D(2, 2, 2)
rot := mgl64.HomogRotate3DY(mgl64.DegToRad(90))
trans := mgl64.Translate3D(4, 5, 6)
stack.Push(trans)
stack.Push(rot)
if !stack.Peek().ApproxEqualThreshold(trans.Mul4(rot), 1e-4) {
t.Errorf("Stack does not multiply first two pushes correctly")
}
stack.Push(scale)
if !stack.Peek().ApproxEqualThreshold(trans.Mul4(rot).Mul4(scale), 1e-4) {
t.Errorf("Stack does not multiple third push correctly")
}
stack.Unwind(2)
stack.Push(scale)
if !stack.Peek().ApproxEqualThreshold(trans.Mul4(scale), 1e-4) {
t.Errorf("Unwinding and multiplying does not work correctly")
}
}
func TestReseed(t *testing.T) {
stack := NewTransformStack()
scale := mgl64.Scale3D(2, 2, 2)
rot := mgl64.HomogRotate3DY(mgl64.DegToRad(90))
trans := mgl64.Translate3D(4, 5, 6)
stack.Push(trans)
stack.Push(rot)
stack.Push(scale)
trans2 := mgl64.Translate3D(1, 2, 3)
err := stack.Reseed(1, trans2)
if err != nil {
t.Fatalf("Rebase returned error when it should not %v", err)
}
if !stack.Peek().ApproxEqualThreshold(trans2.Mul4(rot).Mul4(scale), 1e-4) {
t.Fatalf("Rebase does not remultiply correctly. Got\n %v expected\n %v. (Previous state:\n %v)", stack.Peek(), trans2.Mul4(rot).Mul4(scale), trans.Mul4(rot).Mul4(scale))
}
}
func TestRebase(t *testing.T) {
stack := NewTransformStack()
stack2 := NewTransformStack()
scale := mgl64.Scale3D(2, 2, 2)
rot := mgl64.HomogRotate3DY(mgl64.DegToRad(90))
trans := mgl64.Translate3D(4, 5, 6)
trans2 := mgl64.Translate3D(1, 2, 3)
stack.Push(trans)
stack.Push(rot)
stack2.Push(trans2)
stack2.Push(scale)
out, _ := Rebase(stack2, 1, stack)
if !out.Peek().ApproxEqualThreshold(trans.Mul4(rot).Mul4(trans2).Mul4(scale), 1e-4) {
t.Log("\n", out)
t.Errorf("Rebase unsuccessful. Got\n %v, expected\n %v", out.Peek(), trans.Mul4(rot).Mul4(trans2).Mul4(scale))
}
}
func ExampleReseed() {
stack := NewTransformStack()
scale := mgl64.Scale3D(2, 2, 2)
rot := mgl64.HomogRotate3DY(mgl64.DegToRad(90))
trans := mgl64.Translate3D(4, 5, 6)
stack.Push(trans)
stack.Push(rot)
stack.Push(scale)
fmt.Println("Initial state:\n", stack.Peek())
trans2 := mgl64.Translate3D(1, 2, 3)
err := stack.Reseed(1, trans2)
if err == nil {
panic("Rebase failed")
}
fmt.Println("After rebase:\n", stack.Peek())
fmt.Println("Should be:\n", trans2.Mul4(rot).Mul4(scale))
}
// Render renders
func (renderable *TileTextureMapRenderable) Render(context *RenderContext) {
gl := renderable.gl
renderable.withShader(func() {
renderable.setMatrix32(renderable.viewMatrixUniform, context.ViewMatrix())
renderable.setMatrix32(renderable.projectionMatrixUniform, context.ProjectionMatrix())
gl.BindBuffer(opengl.ARRAY_BUFFER, renderable.vertexPositionBuffer)
gl.VertexAttribOffset(uint32(renderable.vertexPositionAttrib), 3, opengl.FLOAT, false, 0, 0)
textureUnit := int32(0)
gl.ActiveTexture(opengl.TEXTURE0 + uint32(textureUnit))
gl.BindTexture(opengl.TEXTURE_2D, renderable.paletteTexture.Handle())
gl.Uniform1i(renderable.paletteUniform, textureUnit)
textureUnit = 1
gl.ActiveTexture(opengl.TEXTURE0 + uint32(textureUnit))
scaling := mgl.Scale3D(32.0, 32.0, 1.0)
for y, row := range renderable.tiles {
for x, tile := range row {
if tile != nil && *tile.Type != model.Solid && tile.RealWorld != nil {
texture := renderable.textureQuery(*tile.RealWorld.FloorTexture)
if texture != nil {
modelMatrix := mgl.Translate3D(float64(x)*32.0, float64(y)*32.0, 0.0).
Mul4(scaling)
uvMatrix := uvRotations[*tile.RealWorld.FloorTextureRotations]
renderable.setMatrix32(renderable.uvMatrixUniform, uvMatrix)
renderable.setMatrix64(renderable.modelMatrixUniform, &modelMatrix)
verticeCount := renderable.ensureTileType(*tile.Type)
gl.BindTexture(opengl.TEXTURE_2D, texture.Handle())
gl.Uniform1i(renderable.bitmapUniform, textureUnit)
gl.DrawArrays(opengl.TRIANGLES, 0, int32(verticeCount))
}
}
}
}
gl.BindTexture(opengl.TEXTURE_2D, 0)
})
}