init

2026-05-13 20:38:59 +03:00
parent 9055c9c93c
commit 5620324b2e
4904 changed files with 391162 additions and 0 deletions
@@ -0,0 +1,61 @@
+layout(location = 0) in vec3 QuadPosition;
+layout(location = 1) in vec3 SableNormal;
+layout(location = 2) in uvec2 SableData;
+
+layout(std140) uniform SableSprites {
+    vec4 sableSprites[2 * SABLE_TEXTURE_CACHE_SIZE];
+};
+
+uniform mat4 SableTransform;
+
+vec3 Position;
+vec3 Normal;
+vec4 Color;
+vec2 UV0;
+ivec2 UV2;
+
+void _sable_unpack() {
+    uint vertexIndex = uint(gl_VertexID) & 0x3u;
+
+    // Packed data format:
+    // TTTTTTTTTTTTLLLLLLLLZZZZYYYYXXXX
+    // T = Texture ID
+    // L = Packed Light
+    // Z = Relative Z position
+    // Y = Relative Y position
+    // X = Relative X position
+    uint posX = SableData.x & 15u;
+    uint posY = (SableData.x >> 4) & 15u;
+    uint posZ = (SableData.x >> 8) & 15u;
+    uint packedLight = (SableData.x >> 12) & 255u;
+    uint textureId = SableData.x >> 20u;
+
+    // Packed data format:
+    // AAAAAAAAYYYYYYYYZZZZZZZZXXXXXXXX
+    // A = Ambient Occlusion
+    // Y = Section Y
+    // Z = Section Z
+    // X = Section X
+    uint xOffset = (SableData.y) & 0xFFu;
+    uint yOffset = (SableData.y >> 8) & 0xFFu;
+    uint zOffset = (SableData.y >> 16) & 0xFFu;
+    uint ambientOcclusion = (SableData.y >> (24u + (vertexIndex << 1u))) & 0x3u;
+
+    // 0,0 == 0b00
+    // 0,1 == 0b01
+    // 1,1 == 0b10
+    // 1,0 == 0b11
+    uint lower = uint(gl_VertexID) & 1u;
+    uint upper = (uint(gl_VertexID) >> 1) & 1u;
+    vec2 uv = vec2(float(upper), float(lower ^ upper));
+    uint textureOffset = vertexIndex << 3u;
+
+    vec4 textureU = sableSprites[(textureId << 1u)];
+    vec4 textureV = sableSprites[(textureId << 1u) + 1u];
+
+    Position = (SableTransform * vec4(QuadPosition + vec3(float((xOffset << 4u) + posX), float((yOffset << 4u) + posY), float((zOffset << 4u) + posZ)), 1.0)).xyz;
+    Normal = (SableTransform * vec4(SableNormal, 0.0)).xyz;
+    Color = vec4(1.0, 1.0, 1.0, 1.0) * vec4(vec3(1.0 - 0.2 * float(ambientOcclusion)), 1.0);
+    UV0 = vec2(textureU[vertexIndex], textureV[vertexIndex]);
+    UV2 = ivec2(packedLight & 0xF0u, (packedLight << 4) & 0xF0u);
+}