1 files changed, 83 insertions, 0 deletions
diff --git a/cwd/assets/altcraft/shaders/frag/light.fs b/cwd/assets/altcraft/shaders/frag/light.fs
new file mode 100644
index 0000000..a0cda02
--- /dev/null
+++ b/cwd/assets/altcraft/shaders/frag/light.fs
@@ -0,0 +1,83 @@
+#version 330 core
+
+out vec4 fragColor;
+
+in vec2 uv;
+
+uniform sampler2D depthStencil;
+uniform sampler2D color;
+uniform sampler2D normal;
+uniform sampler2D light;
+uniform sampler2D ssao;
+
+uniform int renderBuff;
+uniform bool applySsao;
+
+layout (std140) uniform Globals {
+    mat4 projView;
+    mat4 proj;
+    mat4 invProj;
+    mat4 view;
+    uvec2 viewportSize;
+    vec4 ssaoKernels[64];
+    float globalTime;
+    float dayTime;
+    float gamma;
+};
+
+vec3 RecoverViewWorldPos(vec2 screenPos, float depth) {
+    vec4 viewPos = invProj * vec4(screenPos * 2.0 - 1.0, depth * 2.0 - 1.0, 1.0);
+    return viewPos.xyz / viewPos.w;
+}
+
+void main() {
+    vec4 c = texture(color, uv);
+    vec4 n = texture(normal, uv);
+    n += 1.0f;
+    n /= 2.0f;
+
+    vec4 l = texture(light, uv);
+    float depth = texture(depthStencil, uv).r;
+    float d = (1.0f - depth) * 16.0f;
+    vec4 s = texture(ssao, uv);
+
+    float faceLight = l.r;
+    float skyLight = l.g;
+    float lightLevel = clamp(faceLight + skyLight * dayTime, 0.01f, 1.0f);
+    lightLevel = pow(lightLevel, 3);
+    if (applySsao) {
+        lightLevel *= pow(s.r, 2);
+    }
+    lightLevel = clamp(lightLevel, 0.005f, 1.0f);
+
+    vec4 finalColor = vec4(c.rgb * lightLevel, 1.0f);
+
+    finalColor.rgb = pow(finalColor.rgb, vec3(1.0f / gamma));
+
+    switch(renderBuff) {
+        case 0:
+            fragColor = finalColor;
+            break;
+        case 1:
+            fragColor = c;
+            break;
+        case 2:
+            fragColor = n;
+            break;
+        case 3:
+            fragColor = vec4(RecoverViewWorldPos(uv, depth), 1.0f);
+            break;
+        case 4:
+            fragColor = vec4(0.5f);
+            break;
+        case 5:
+            fragColor = vec4(l.r, l.g, 1.0f - l.b, 1.0f);
+            break;
+        case 6:
+            fragColor = vec4(vec3(d), 1.0f);
+            break;
+        case 7:
+            fragColor = vec4(pow(s.r, 2));
+            break;
+    }
+}