refactor: grid and timer using zephr

shaders/grid_f.frag

@@ -1,51 +0,0 @@
-#version 330 core
-
-out vec4 FragColor;
-
-uniform mat4 transform;
-uniform float resolution;
-
-void main()
-{
-    // Define the size of the grid
-    int gridSize = 9;
-    
-    // Calculate the step size for the grid lines
-    float stepSize = 2.0 / float(gridSize);
-
-    // Calculate the UV coordinates of the current fragment
-    vec2 uv = (gl_FragCoord * transform).xy / vec2(resolution, resolution); // Adjust the resolution as needed
-    float scale_x = transform[0][0];
-    float scale_y = transform[1][1];
-
-    // Calculate the coordinates of the current fragment in the [-1, 1] range
-    float fragCoordX = (uv.x - 0.5) * (2.0 / scale_x) - 1.0;
-    float fragCoordY = (uv.y - 0.5) * (2.0 / scale_y) - 1.0;
-    
-    // Colors for grid lines
-    vec3 gridColor = vec3(0.4, 0.4, 0.4);
-    vec3 gridColorThick = vec3(0.2, 0.2, 0.2);
-
-    bool isInsideGridHorizontally = (fragCoordX >= -2.0 && fragCoordX <= 0.0);
-    bool isInsideGridVertically = (fragCoordY >= -2.0 && fragCoordY <= 0.0);
-    bool isInsideGrid = isInsideGridHorizontally && isInsideGridVertically;
-
-    // Determine if the current fragment is on a thicker grid line
-    bool isThickLineX = isInsideGrid && mod(fragCoordX, (stepSize + 0.0007) * 3) <= 0.01;
-    bool isThickLineY = isInsideGrid && mod(fragCoordY, (stepSize + 0.0007) * 3) <= 0.01;
-
-    // Check if the current fragment is on a grid line
-    // 0.0007 to shift the grid lines a bit to the left
-    bool isGridX = isInsideGrid && mod(fragCoordX, stepSize + 0.0007) <= 0.005;
-    bool isGridY = isInsideGrid && mod(fragCoordY, stepSize + 0.0007) <= 0.005;
-    
-    // Set the fragment color based on whether it's a grid line or a thicker grid line
-    if ((isThickLineX) || (isThickLineY)) {
-        FragColor = vec4(gridColorThick, 1.0);
-    } else if (isGridX || isGridY) {
-        FragColor = vec4(gridColor, 1.0);
-    } else {
-        FragColor = vec4(240.f/255.f, 235.f/255.f, 227.f/255.f, 1.0);
-    }
-}
-

shaders/quad.frag

@@ -1,8 +0,0 @@
-#version 330 core
-
-out vec4 FragColor;
-uniform vec4 aColor;
-
-void main() {
-  FragColor = vec4(aColor);
-}