revert to vanilla assets

public/assets/minecraft/shaders/post/transparency.fsh

@@ -0,0 +1,68 @@
+#version 330
+
+uniform sampler2D MainSampler;
+uniform sampler2D MainDepthSampler;
+uniform sampler2D TranslucentSampler;
+uniform sampler2D TranslucentDepthSampler;
+uniform sampler2D ItemEntitySampler;
+uniform sampler2D ItemEntityDepthSampler;
+uniform sampler2D ParticlesSampler;
+uniform sampler2D ParticlesDepthSampler;
+uniform sampler2D WeatherSampler;
+uniform sampler2D WeatherDepthSampler;
+uniform sampler2D CloudsSampler;
+uniform sampler2D CloudsDepthSampler;
+
+in vec2 texCoord;
+
+vec4 color_layers[6] = vec4[](vec4(0.0), vec4(0.0), vec4(0.0), vec4(0.0), vec4(0.0), vec4(0.0));
+float depth_layers[6] = float[](0, 0, 0, 0, 0, 0);
+int active_layers = 0;
+
+out vec4 fragColor;
+
+void try_insert(vec4 color, float depth) {
+    if (color.a == 0.0) {
+        return;
+    }
+
+    color_layers[active_layers] = color;
+    depth_layers[active_layers] = depth;
+
+    int jj = active_layers++;
+    int ii = jj - 1;
+    while (jj > 0 && depth_layers[jj] < depth_layers[ii]) {
+        float depthTemp = depth_layers[ii];
+        depth_layers[ii] = depth_layers[jj];
+        depth_layers[jj] = depthTemp;
+
+        vec4 colorTemp = color_layers[ii];
+        color_layers[ii] = color_layers[jj];
+        color_layers[jj] = colorTemp;
+
+        jj = ii--;
+    }
+}
+
+vec3 blend(vec3 dst, vec4 src) {
+    return (dst * (1.0 - src.a)) + src.rgb;
+}
+
+void main() {
+    color_layers[0] = vec4(texture(MainSampler, texCoord).rgb, 1.0);
+    depth_layers[0] = texture(MainDepthSampler, texCoord).r;
+    active_layers = 1;
+
+    try_insert(texture(TranslucentSampler, texCoord), texture(TranslucentDepthSampler, texCoord).r);
+    try_insert(texture(ItemEntitySampler, texCoord), texture(ItemEntityDepthSampler, texCoord).r);
+    try_insert(texture(ParticlesSampler, texCoord), texture(ParticlesDepthSampler, texCoord).r);
+    try_insert(texture(WeatherSampler, texCoord), texture(WeatherDepthSampler, texCoord).r);
+    try_insert(texture(CloudsSampler, texCoord), texture(CloudsDepthSampler, texCoord).r);
+
+    vec3 texelAccum = color_layers[0].rgb;
+    for (int ii = 1; ii < active_layers; ++ii) {
+        texelAccum = blend(texelAccum, color_layers[ii]);
+    }
+
+    fragColor = vec4(texelAccum.rgb, 1.0);
+}