feat: pattern editor

public/index.html

@@ -103,8 +103,16 @@
                             </div>
                         </div>
 
-                        <!-- Add Layer Button -->
+                        <!-- Add Layer Section -->
                         <div class="editor-section-compact">
+                            <h3 class="section-title-compact">Add Layer</h3>
+                            <div class="editor-input-wrapper">
+                                <label>Layer Type</label>
+                                <select id="editor-layer-type">
+                                    <option value="shape">Shape</option>
+                                    <option value="pattern">Pattern</option>
+                                </select>
+                            </div>
                             <button class="btn btn-primary btn-full-width" id="editor-add-layer">➕ Add Layer</button>
                         </div>
 

public/scripts/canvas-renderer.js

@@ -138,6 +138,38 @@ class CanvasRenderer {
                 };
             }
             
+            case 'palette': {
+                const stops = colorConfig.stops || [
+                    { position: 0, color: '000000' },
+                    { position: 1, color: 'ffffff' }
+                ];
+                
+                return (t) => {
+                    const clamped = this.clamp(t, 0, 1);
+                    
+                    // Find the two stops to interpolate between
+                    let stop1 = stops[0];
+                    let stop2 = stops[stops.length - 1];
+                    
+                    for (let i = 0; i < stops.length - 1; i++) {
+                        if (clamped >= stops[i].position && clamped <= stops[i + 1].position) {
+                            stop1 = stops[i];
+                            stop2 = stops[i + 1];
+                            break;
+                        }
+                    }
+                    
+                    // Interpolate between the two stops
+                    const range = stop2.position - stop1.position;
+                    const localT = range > 0 ? (clamped - stop1.position) / range : 0;
+                    
+                    const rgb1 = this.hexToRgb(stop1.color);
+                    const rgb2 = this.hexToRgb(stop2.color);
+                    
+                    return this.rgbToHex(this.lerpRgb(rgb1, rgb2, localT));
+                };
+            }
+            
             default:
                 return () => 'ff0000';
         }

public/scripts/preset-editor.js

@@ -157,15 +157,14 @@ class PresetEditor {
     }
 
     addLayer() {
-        // Create a default shape layer
-        const layer = {
-            type: 'shape',
-            shape: 'circle',
-            position: { x: 8, y: 8 },
-            size: { radius: 3, width: 5, height: 5 },
-            color: { type: 'solid', value: 'ff0000' },
-            intensity: 1.0
-        };
+        const layerType = document.getElementById('editor-layer-type')?.value || 'shape';
+        
+        let layer;
+        if (layerType === 'pattern') {
+            layer = this.createPatternLayer();
+        } else {
+            layer = this.createShapeLayer();
+        }
         
         this.configuration.layers.push(layer);
         
@@ -198,64 +197,39 @@ class PresetEditor {
     }
 
     createShapeLayer() {
-        const shape = document.getElementById('editor-shape-type')?.value || 'circle';
-        const colorType = document.getElementById('editor-color-type')?.value || 'solid';
-        const colorInput = document.getElementById('editor-color-value');
-        
-        // Get color value and convert from #RRGGBB to RRGGBB format
-        let colorValue = 'ff0000';
-        if (colorInput && colorInput.value) {
-            colorValue = colorInput.value.replace('#', '');
-        }
-        
-        const animationType = document.getElementById('editor-animation-type')?.value;
-        
-        const layer = {
+        return {
             type: 'shape',
-            shape: shape,
-            position: { 
-                x: parseFloat(document.getElementById('editor-pos-x')?.value || 8),
-                y: parseFloat(document.getElementById('editor-pos-y')?.value || 8)
-            },
-            size: {
-                radius: parseFloat(document.getElementById('editor-size-radius')?.value || 3),
-                width: parseFloat(document.getElementById('editor-size-width')?.value || 5),
-                height: parseFloat(document.getElementById('editor-size-height')?.value || 5)
-            },
-            color: {
-                type: colorType,
-                value: colorValue
-            },
-            intensity: parseFloat(document.getElementById('editor-intensity')?.value || 1.0),
+            shape: 'circle',
+            position: { x: 8, y: 8 },
+            size: { radius: 3, width: 5, height: 5 },
+            color: { type: 'solid', value: 'ff0000' },
+            intensity: 1.0
         };
-        
-        if (animationType && animationType !== 'none') {
-            layer.animation = this.createAnimation(animationType);
-        }
-        
-        return layer;
     }
 
     createPatternLayer() {
-        const pattern = document.getElementById('editor-pattern-type')?.value || 'radial';
-        const colorType = document.getElementById('editor-color-type')?.value || 'solid';
-        const colorInput = document.getElementById('editor-color-value');
-        
-        // Get color value and convert from #RRGGBB to RRGGBB format
-        let colorValue = 'ff0000';
-        if (colorInput && colorInput.value) {
-            colorValue = colorInput.value.replace('#', '');
-        }
-        
         return {
             type: 'pattern',
-            pattern: pattern,
+            pattern: 'spiral',
             color: {
-                type: colorType,
-                value: colorValue
+                type: 'palette',
+                stops: [
+                    { position: 0.0, color: 'ff0000' },
+                    { position: 0.17, color: 'ff8800' },
+                    { position: 0.33, color: 'ffff00' },
+                    { position: 0.5, color: '00ff00' },
+                    { position: 0.67, color: '0088ff' },
+                    { position: 0.83, color: '8800ff' },
+                    { position: 1.0, color: 'ff0088' }
+                ]
             },
             intensity: 1.0,
-            params: this.getPatternParams(pattern)
+            params: {
+                centerX: 8,
+                centerY: 8,
+                arms: 5,
+                rotationSpeed: 1.0
+            }
         };
     }