galaxyGame/layer_test.html at main · trmccormick/galaxyGame · GitHub

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<!DOCTYPE html>
<html>
<head>
    <title>Layer Rendering Test</title>
</head>
<body>
    <h1>SimEarth-Style Layer Rendering Test</h1>
    <div>
        <button id="terrainBtn" class="active">Terrain (Base)</button>
        <button id="waterBtn">Water</button>
        <button id="biomesBtn">Biomes</button>
    </div>
    <canvas id="testCanvas" width="360" height="180" style="border: 1px solid black;"></canvas>
    <script>
        // Test elevation data (simplified Earth-like)
        const testElevation = [
            Array(360).fill().map((_, i) => -5000 + Math.sin(i * Math.PI / 180) * 2000), // Ocean trench to coastal
            Array(360).fill().map((_, i) => Math.cos(i * Math.PI / 180) * 1000 + 100),  // Lowlands
            Array(360).fill().map((_, i) => Math.sin(i * Math.PI / 90) * 2000 + 1500),  // Mountains
        ];

        // Test biome data
        const testBiomes = [
            Array(360).fill('ocean'),
            Array(360).fill('plains'),
            Array(360).fill('mountains'),
        ];

        // Test water data (depths)
        const testWater = [
            Array(360).fill(1000), // Deep water
            Array(360).fill(0),    // Land
            Array(360).fill(0),    // Land
        ];

        // Calculate min/max for normalization
        let minElevation = Infinity, maxElevation = -Infinity;
        testElevation.forEach(row => {
            row.forEach(elev => {
                minElevation = Math.min(minElevation, elev);
                maxElevation = Math.max(maxElevation, elev);
            });
        });

        console.log('Test elevation range:', minElevation, 'to', maxElevation);

        // Layer visibility
        let visibleLayers = new Set(['terrain']);

        // Color blending utility
        function blendColors(baseColor, overlayColor, alpha) {
            function hexToRgb(hex) {
                const result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(hex);
                return result ? {
                    r: parseInt(result[1], 16),
                    g: parseInt(result[2], 16),
                    b: parseInt(result[3], 16)
                } : null;
            }

            const base = hexToRgb(baseColor);
            const overlay = hexToRgb(overlayColor);

            if (!base || !overlay) return baseColor;

            const r = Math.round(base.r * (1 - alpha) + overlay.r * alpha);
            const g = Math.round(base.g * (1 - alpha) + overlay.g * alpha);
            const b = Math.round(base.b * (1 - alpha) + overlay.b * alpha);

            return '#' + r.toString(16).padStart(2, '0') + g.toString(16).padStart(2, '0') + b.toString(16).padStart(2, '0');
        }

        // Pure elevation heightmap colors (SimEarth-style)
        function getElevationColor(elevationMeters) {
            if (elevationMeters === null || elevationMeters === undefined) {
                return '#000000';
            }

            const normalized = (elevationMeters - minElevation) / (maxElevation - minElevation);

            if (normalized < 0.2) {
                // Very low elevation - dark blue/black (ocean basins)
                const intensity = Math.floor(10 + (normalized / 0.2) * 40);
                return `rgb(${intensity}, ${intensity}, ${Math.floor(intensity * 1.5)})`;
            } else if (normalized < 0.4) {
                // Low elevation - dark brown (coastal plains)
                const intensity = Math.floor(40 + ((normalized - 0.2) / 0.2) * 60);
                return `rgb(${intensity}, ${Math.floor(intensity * 0.7)}, ${Math.floor(intensity * 0.4)})`;
            } else if (normalized < 0.6) {
                // Mid elevation - brown (plains)
                const intensity = Math.floor(100 + ((normalized - 0.4) / 0.2) * 55);
                return `rgb(${intensity}, ${Math.floor(intensity * 0.8)}, ${Math.floor(intensity * 0.6)})`;
            } else if (normalized < 0.8) {
                // High elevation - tan/gray (mountains)
                const intensity = Math.floor(155 + ((normalized - 0.6) / 0.2) * 40);
                return `rgb(${intensity}, ${intensity}, ${Math.floor(intensity * 0.9)})`;
            } else {
                // Very high elevation - light gray/white (peaks)
                const intensity = Math.floor(195 + ((normalized - 0.8) / 0.2) * 60);
                return `rgb(${intensity}, ${intensity}, ${intensity})`;
            }
        }

        // Biome overlay colors
        function getBiomeColor(biome) {
            switch (biome) {
                case 'ocean': return '#001122';
                case 'desert': return '#DAA520';
                case 'grassland': return '#228B22';
                case 'forest': return '#006400';
                case 'plains': return '#8B4513';
                case 'mountains': return '#696969';
                case 'peaks': return '#D3D3D3';
                default: return '#8B4513';
            }
        }

        // Render function
        function render() {
            const canvas = document.getElementById('testCanvas');
            const ctx = canvas.getContext('2d');
            const width = testElevation[0].length;
            const height = testElevation.length;
            const scale = 1;

            canvas.width = width * scale;
            canvas.height = height * scale;

            for (let y = 0; y < height; y++) {
                for (let x = 0; x < width; x++) {
                    const elevation = testElevation[y][x];

                    // BASE LAYER: Pure elevation heightmap (ALWAYS rendered)
                    let color = getElevationColor(elevation);

                    // LAYER 1: Water overlay (if enabled)
                    if (visibleLayers.has('water') && testWater[y][x] > 0) {
                        const waterDepth = testWater[y][x];
                        const blueIntensity = Math.min(255, 100 + (waterDepth / 1000) * 155);
                        color = `rgba(0, 0, ${Math.floor(blueIntensity)}, 0.8)`;
                    }

                    // LAYER 2: Biome overlay (if enabled)
                    if (visibleLayers.has('biomes') && testBiomes[y][x]) {
                        const biome = testBiomes[y][x];
                        if (biome && biome !== 'ocean') {
                            const isUnderwater = visibleLayers.has('water') && testWater[y][x] > 0;
                            if (!isUnderwater) {
                                color = getBiomeColor(biome);
                            }
                        }
                    }

                    ctx.fillStyle = color;
                    ctx.fillRect(x * scale, y * scale, scale, scale);
                }
            }

            console.log('Rendered with layers:', Array.from(visibleLayers));
        }

        // Button handlers
        document.getElementById('terrainBtn').addEventListener('click', () => {
            visibleLayers.clear();
            visibleLayers.add('terrain');
            updateButtons();
            render();
        });

        document.getElementById('waterBtn').addEventListener('click', () => {
            if (visibleLayers.has('water')) {
                visibleLayers.delete('water');
            } else {
                visibleLayers.add('water');
            }
            updateButtons();
            render();
        });

        document.getElementById('biomesBtn').addEventListener('click', () => {
            if (visibleLayers.has('biomes')) {
                visibleLayers.delete('biomes');
            } else {
                visibleLayers.add('biomes');
            }
            updateButtons();
            render();
        });

        function updateButtons() {
            document.getElementById('terrainBtn').classList.toggle('active', visibleLayers.has('terrain'));
            document.getElementById('waterBtn').classList.toggle('active', visibleLayers.has('water'));
            document.getElementById('biomesBtn').classList.toggle('active', visibleLayers.has('biomes'));
        }

        // Initial render
        render();
    </script>
    <style>
        button { margin: 5px; padding: 5px 10px; }
        .active { background: #ccc; }
    </style>
</body>
</html></content>
<parameter name="filePath">/Users/tam0013/Documents/git/galaxyGame/layer_test.html