REVIEWED: example: Compute shader Game-of-life

examples/shaders/resources/shaders/glsl430/gol.glsl

@@ -1,64 +0,0 @@
-// Game of Life logic shader
-#version 430
-
-#define GOL_WIDTH 768
-
-layout (local_size_x = 16, local_size_y = 16, local_size_z = 1) in;
-
-layout(std430, binding = 1) readonly restrict buffer golLayout {
-    uint golBuffer[]; // golBuffer[x, y] = golBuffer[x + gl_NumWorkGroups.x * y]
-};
-
-layout(std430, binding = 2) writeonly restrict buffer golLayout2 {
-    uint golBufferDest[]; // golBufferDest[x, y] = golBufferDest[x + gl_NumWorkGroups.x * y]
-};
-
-#define fetchGol(x, y) ((((x) < 0) || ((y) < 0) || ((x) > GOL_WIDTH) || ((y) > GOL_WIDTH)) \
-    ? (0) \
-    : golBuffer[(x) + GOL_WIDTH * (y)])
-
-#define setGol(x, y, value) golBufferDest[(x) + GOL_WIDTH * (y)] = value
-
-void main()
-{
-    uint neighbour_count = 0;
-    uint x = gl_GlobalInvocationID.x;
-    uint y = gl_GlobalInvocationID.y;
-
-    // Top left
-    neighbour_count += fetchGol(x - 1, y - 1);
-
-    // Top middle
-    neighbour_count += fetchGol(x, y - 1);
-
-    // Top right
-    neighbour_count += fetchGol(x + 1, y - 1);
-
-    // Left
-    neighbour_count += fetchGol(x - 1, y);
-
-    // Right
-    neighbour_count += fetchGol(x + 1, y);
-
-    // Bottom left
-    neighbour_count += fetchGol(x - 1, y + 1);
-
-    // Bottom middle
-    neighbour_count += fetchGol(x, y + 1);
-
-    // Bottom right
-    neighbour_count += fetchGol(x + 1, y + 1);
-
-    if (neighbour_count == 3)
-    {
-        setGol(x, y, 1);
-    }
-    else if (neighbour_count == 2)
-    {
-        setGol(x, y, fetchGol(x, y));
-    }
-    else
-    {
-        setGol(x, y, 0);
-    }
-}

examples/shaders/resources/shaders/glsl430/gol_render.glsl

@@ -1,34 +0,0 @@
-// Game of Life rendering shader
-// Just renders the content of the ssbo at binding 1 to screen.
-#version 430
-
-#define GOL_WIDTH 768
-
-// Input vertex attributes (from vertex shader)
-in vec2 fragTexCoord;
-
-// Output fragment color
-out vec4 finalColor;
-
-// Input game of life grid.
-layout(std430, binding = 1) readonly buffer golLayout
-{
-    uint golBuffer[];
-};
-
-// Output resolution
-uniform vec2 res;
-
-void main()
-{
-    ivec2 coords = ivec2(fragTexCoord * res);
-
-    if (golBuffer[coords.x + coords.y * uvec2(res).x] == 1)
-    {
-        finalColor = vec4(1.0);
-    }
-    else
-    {
-        finalColor = vec4(0.0, 0.0, 0.0, 1.0);
-    }
-}

examples/shaders/resources/shaders/glsl430/gol_transfert.glsl

@@ -1,54 +0,0 @@
-// Game of life transfert shader.
-#version 430
-#define GOL_WIDTH 768
-
-// Structure definitions
-struct GolUpdateCmd {
-    uint x; // x coordinate of the gol command
-    uint y; // y coordinate of the gol command
-    uint w; // width of the filled zone
-    uint enabled; // whether to enable or disable zone
-};
-
-// Local compute unit size.
-layout (local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
-
-// Output game of life grid buffer.
-layout(std430, binding = 1) buffer golBufferLayout
-{
-    uint golBuffer[]; // golBuffer[x, y] = golBuffer[x + GOL_WIDTH * y]
-};
-
-// Command buffer
-layout(std430, binding = 3) readonly restrict buffer golUpdateLayout
-{
-    uint count;
-    GolUpdateCmd commands[];
-};
-
-#define isInside(x, y) (((x) >= 0) && ((y) >= 0) && ((x) < GOL_WIDTH) && ((y) < GOL_WIDTH))
-#define getBufferIndex(x, y) ((x) + GOL_WIDTH * (y))
-
-void main()
-{
-    uint cmd_index = gl_GlobalInvocationID.x;
-    GolUpdateCmd cmd = commands[cmd_index];
-
-    for (uint x = cmd.x; x < (cmd.x + cmd.w); x++)
-    {
-        for (uint y = cmd.y; y < (cmd.y + cmd.w); y++)
-        {
-            if (isInside(x, y))
-            {
-                if (cmd.enabled != 0)
-                {
-                    atomicOr(golBuffer[getBufferIndex(x, y)], 1);
-                }
-                else
-                {
-                    atomicAnd(golBuffer[getBufferIndex(x, y)], 0);
-                }
-            }
-        }
-    }
-}