Initial Commit

shaders/liquid-glass.frag

@@ -0,0 +1,122 @@
+#version 440
+
+layout(location = 0) in vec2 qt_TexCoord0;
+layout(location = 0) out vec4 fragColor;
+
+layout(std140, binding = 0) uniform buf {
+    mat4 qt_Matrix;
+    float qt_Opacity;
+    float time;
+    float warpStrength;
+    float flowSpeed;
+    float scale;
+    float edgeReflectionStrength;
+    float edgeReflectionWidth;
+} ubuf;
+
+layout(binding = 1) uniform sampler2D source;
+
+// Smooth noise function for organic liquid movement
+float noise(vec2 p) {
+    return sin(p.x * 1.5) * sin(p.y * 1.5);
+}
+
+// Fractal noise for more complex patterns
+float fbm(vec2 p) {
+    float value = 0.0;
+    float amplitude = 0.5;
+
+    for(int i = 0; i < 4; i++) {
+        value += amplitude * noise(p);
+        p *= 2.0;
+        amplitude *= 0.5;
+    }
+    return value;
+}
+
+void main() {
+    vec2 uv = qt_TexCoord0;
+
+    // Create flowing liquid-like distortion
+    vec2 flowDir1 = vec2(
+        fbm(uv * ubuf.scale + ubuf.time * ubuf.flowSpeed),
+        fbm(uv * ubuf.scale + ubuf.time * ubuf.flowSpeed + 100.0)
+    );
+
+    vec2 flowDir2 = vec2(
+        fbm(uv * ubuf.scale * 0.7 - ubuf.time * ubuf.flowSpeed * 0.8 + 200.0),
+        fbm(uv * ubuf.scale * 0.7 - ubuf.time * ubuf.flowSpeed * 0.8 + 300.0)
+    );
+
+    // Combine flows for more organic movement
+    vec2 finalFlow = (flowDir1 + flowDir2 * 0.5) * ubuf.warpStrength * 0.01;
+
+    // Apply subtle chromatic aberration
+    float aberration = length(finalFlow) * 0.5;
+
+    vec2 distortedUV = uv + finalFlow;
+
+    // Sample with slight chromatic separation for main glass effect
+    float r = texture(source, distortedUV + vec2(aberration, 0.0)).r;
+    float g = texture(source, distortedUV).g;
+    float b = texture(source, distortedUV - vec2(aberration, 0.0)).b;
+
+    vec4 glassColor = vec4(r, g, b, 1.0);
+
+    // Simple edge reflection 
+    float edgeWidth = ubuf.edgeReflectionWidth;
+
+    // Calculate distance from edges
+    float distFromLeft = uv.x;
+    float distFromRight = 1.0 - uv.x;
+    float distFromTop = uv.y;
+    float distFromBottom = 1.0 - uv.y;
+
+    // Find the minimum distance to any edge
+    float minDistToEdge = min(min(distFromLeft, distFromRight), min(distFromTop, distFromBottom));
+
+    // Create edge mask
+    float edgeMask = smoothstep(edgeWidth, 0.0, minDistToEdge);
+
+    if (edgeMask > 0.0) {
+        vec2 reflectionUV = distortedUV;
+
+        // Simple reflection logic
+        if (minDistToEdge == distFromLeft) {
+            // Left edge - flip horizontally
+            reflectionUV.x = 0.5 - distortedUV.x;
+        } else if (minDistToEdge == distFromRight) {
+            // Right edge - keep as is but sample from further right
+            reflectionUV.x = distortedUV.x + 0.1;
+        } else if (minDistToEdge == distFromTop) {
+            // Top edge - flip vertically
+            reflectionUV.y = 0.5 - distortedUV.y;
+        } else {
+            // Bottom edge - flip vertically
+            reflectionUV.y = 0.5 - distortedUV.y + 0.1;
+        }
+
+        // Clamp to valid range
+        reflectionUV = clamp(reflectionUV, 0.0, 1.0);
+
+        // Sample reflection with same chromatic aberration
+        float rRefl = texture(source, reflectionUV + vec2(aberration, 0.0)).r;
+        float gRefl = texture(source, reflectionUV).g;
+        float bRefl = texture(source, reflectionUV - vec2(aberration, 0.0)).b;
+
+        vec4 reflectionColor = vec4(rRefl, gRefl, bRefl, 1.0);
+
+        // Blend reflection with glass effect
+        glassColor = mix(glassColor, reflectionColor, edgeMask * ubuf.edgeReflectionStrength);
+    }
+
+    // Simple glass overlay enhancement
+    vec2 centeredUV = (uv - 0.5) * 2.0;
+    float fresnel = pow(1.0 - abs(dot(normalize(vec3(centeredUV, 1.0)), vec3(0.0, 0.0, 1.0))), 1.5);
+
+    // Add subtle white tint and fresnel
+    glassColor.rgb = mix(glassColor.rgb, vec3(1.0), 0.02 + fresnel * 0.03);
+
+    fragColor = glassColor * ubuf.qt_Opacity;
+}
+