feat: Added shader loading and swapping as well as beginnings of out of the box noise generation and support for multiple render passes

resources/shaders/glitch.wgsl

@@ -0,0 +1,89 @@
+// Vertex shader
+struct CameraUniform {
+    view_proj: mat4x4<f32>,
+};
+@group(1) @binding(0) // 1.
+var<uniform> camera: CameraUniform;
+
+struct VertexInput {
+    @location(0) position: vec3<f32>,
+    @location(1) tex_coords: vec2<f32>,
+    @location(2) color: vec4<f32>,
+}
+
+struct VertexOutput {
+    @builtin(position) clip_position: vec4<f32>,
+    @location(0) tex_coords: vec2<f32>,
+    @location(1) color: vec4<f32>,
+}
+
+@vertex
+fn vs_main(
+    model: VertexInput,
+) -> VertexOutput {
+    var out: VertexOutput;
+    out.tex_coords = model.tex_coords;
+    out.color = model.color;
+    out.clip_position = camera.view_proj * vec4<f32>(model.position, 1.0);
+    return out;
+}
+
+@group(0) @binding(0)
+var t_diffuse: texture_2d<f32>;  // Diffuse texture
+@group(0) @binding(1)
+var s_diffuse: sampler;  // Sampler for the texture
+
+// A simple pseudo-random number generator (using fragment coordinates)
+fn rand2D(p: vec2<f32>) -> f32 {
+    let s = sin(dot(p, vec2<f32>(12.9898, 78.233)));  // Pseudorandom calculation
+    return fract(s * 43758.5453);  // Return value between 0 and 1
+}
+
+@fragment
+fn fs_main(in: VertexOutput) -> @location(0) vec4<f32> {
+    // Sample the texture using the input texture coordinates
+    var texColor: vec4<f32> = textureSample(t_diffuse, s_diffuse, in.tex_coords);
+
+    // Random horizontal displacement for glitching effect
+    let glitchStrength = 0.03;  // How far the texture will "glitch"
+    let glitchAmount = rand2D(in.tex_coords * 100.0);  // Use a different scale for more variation
+    var displacedUV = in.tex_coords + vec2<f32>(glitchAmount * glitchStrength, 0.0);
+
+    // Sample the texture at the displaced position
+    texColor = textureSample(t_diffuse, s_diffuse, displacedUV);
+
+    // Apply random color flickering
+    let colorFlickerAmount = rand2D(in.tex_coords * 50.0);  // More frequency for faster flickering
+    texColor.r *= mix(0.7, 1.3, colorFlickerAmount);  // Randomly adjust red channel brightness
+    texColor.g *= mix(0.7, 1.3, colorFlickerAmount);  // Randomly adjust green channel brightness
+    texColor.b *= mix(0.7, 1.3, colorFlickerAmount);  // Randomly adjust blue channel brightness
+
+    // Occasionally "flicker" the texture to simulate complete signal loss
+    let flickerChance = rand2D(in.tex_coords * 200.0);  // Different scale for randomness
+    if (flickerChance < 0.05) {  // 5% chance to completely "flicker" out
+        texColor.r = 0.0;  // Turn red channel to black
+        texColor.g = 0.0;  // Turn green channel to black
+        texColor.b = 0.0;  // Turn blue channel to black
+    }
+
+    // Apply random horizontal offset to simulate screen tearing
+    let tearEffect = rand2D(in.tex_coords * 25.0);  // Vary this value for different effects
+    if (tearEffect < 0.15) {
+        texColor.r = 1.0;  // Simulate red "tear"
+        texColor.g = 0.0;  // No green in the tear
+        texColor.b = 0.0;  // No blue in the tear
+    } else if (tearEffect < 0.3) {
+        texColor.r = 0.0;  // No red in the tear
+        texColor.g = 1.0;  // Simulate green "tear"
+        texColor.b = 0.0;  // No blue in the tear
+    }
+
+    // Optionally, you can add a "flickering noise" layer for additional effect
+    let noiseAmount = rand2D(in.tex_coords * 500.0);  // Highly random noise for flickering
+    texColor.r += noiseAmount * 0.1;  // Add small amount of random noise to red channel
+    texColor.g += noiseAmount * 0.1;  // Add small amount of random noise to green channel
+    texColor.b += noiseAmount * 0.1;  // Add small amount of random noise to blue channel
+
+    // Return the altered texture color
+    return texColor;
+}