delete cursed depth buffer

engine/depth.go

@@ -1,87 +0,0 @@
-package engine
-
-import (
-	"image"
-	"log"
-
-	"github.com/hajimehoshi/ebiten/v2"
-)
-
-const screenShaderSrc = `package main
-
-func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
-	// Image 0 is the image being drawn.
-	// Image 1 is the depth map of the image being drawn.
-	// Image 2 is the depth buffer.
-
-	// Convert the colours from the depth map and depth buffer into scalars.
-	stairs := vec4(1, 256, 65536, 16777216)
-	c1 := imageSrc1UnsafeAt(texCoord)
-	c2 := imageSrc2UnsafeAt(texCoord)
-	d1 := dot(c1, stairs)
-	d2 := dot(c2, stairs)
-
-	// If the depth buffer value is higher, return transparent.
-	if d2 > d1 {
-		return vec4(0)
-	}
-	return imageSrc0UnsafeAt(texCoord)
-}
-`
-
-const depthShaderSrc = `package main
-
-func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
-	// Image 0 is the depth buffer being updated.
-	// Image 1 is the depth map being drawn from.
-
-	// Convert the colour vectors into scalars.
-	stairs := vec4(1, 256, 65536, 16777216)
-	c0 := imageSrc0UnsafeAt(texCoord)
-	c1 := imageSrc1UnsafeAt(texCoord)
-	d0 := dot(c0, stairs)
-	d1 := dot(c1, stairs)
-
-	// Write back the larger of the two.
-	if d0 > d1 {
-		return c0
-	}
-	return c1
-}
-`
-
-var depthShader, screenShader *ebiten.Shader
-
-func init() {
-	ds, err := ebiten.NewShader([]byte(depthShaderSrc))
-	if err != nil {
-		log.Fatalf("Compiling depth shader: %v", err)
-	}
-	depthShader = ds
-
-	ss, err := ebiten.NewShader([]byte(screenShaderSrc))
-	if err != nil {
-		log.Fatalf("Compiling screen shader: %v", err)
-	}
-	screenShader = ss
-}
-
-type DepthBuffer struct {
-	buffer *ebiten.Image
-}
-
-func NewDepthBuffer(size image.Point) *DepthBuffer {
-	return &DepthBuffer{
-		buffer: ebiten.NewImage(size.X, size.Y),
-	}
-}
-
-func (b *DepthBuffer) Draw(dst, src, srcDepth *ebiten.Image) {
-	w, h := 0, 0
-	dst.DrawRectShader(w, h, screenShader, &ebiten.DrawRectShaderOptions{
-		Images: [4]*ebiten.Image{src, srcDepth, b.buffer},
-	})
-	dst.DrawRectShader(w, h, depthShader, &ebiten.DrawRectShaderOptions{
-		Images: [4]*ebiten.Image{b.buffer, srcDepth},
-	})
-}