examples.js

'use strict';


(() => {
	
	const examples = {
		
		sand: `
			void main() {
				
				vec3 uv3 = getUv3(varUv);
				vec2 suv = varUv * 32.0;
				
				float wave = abs(sin(M_PI * (suv.x + suv.y + 2.3 * noise(uv3 * 5.0))));
				
				float waveMask = noise(uv3 * 2.0);
				
				vec3 baseColor = texture2D(_grain, varUv).xyz * 0.9;
				baseColor.z *= 0.6;
				
				vec3 grainColor = texture2D(_grain, varUv * 2.0).xyz;
				
				vec3 color = vec3(0.3 + wave * 0.7, 0.3 + wave * 0.7, wave * 0.6);
				
				vec3 mixed1 = mix(color, baseColor, min(0.97, 0.6 + waveMask * 0.8));
				vec3 mixed2 = mix(mixed1, grainColor, 0.65);
				
				gl_FragColor = vec4(mixed2, 1.0);
				
			}
		`,
		
		dirt: `
			void main() {
				
				vec3 uv3 = getUv3(varUv);
				
				vec3 baseColor = texture2D(_grain, varUv).xyz * 0.6;
				baseColor.y *= 0.8;
				baseColor.z *= 0.6;
				
				vec3 grainColor = texture2D(_grain, varUv * 2.0).xyz * 0.4;
				
				float wave = noise(uv3 * 7.0) * 0.5;
				
				vec3 mixed1 = mix(vec3(wave), grainColor, 0.8);
				vec3 mixed2 = mix(baseColor, mixed1, 0.3);
				
				gl_FragColor = vec4(mixed2, 1.0);
				
			}
		`,
		
		stone: `
			void main() {
				
				vec3 uv3 = getUv3(varUv);
				
				vec3 grainColor = texture2D(_grain, varUv * 2.0).xyz * 0.5;
				
				float wave = noise(uv3 * 3.0);
				vec3 back = mix(vec3(wave * 0.3), grainColor, 0.9);
				
				float crackMask1 = pow(min(1.0, noise(vec3(uv3.zxy + 4.0) * 2.5) * 1.5), 18.0);
				float crackMask2 = pow(min(1.0, noise(vec3(uv3.xzy - 4.0) * 2.5) * 1.5), 18.0);
				
				vec2 crackUv = -varUv.yx * 6.0;
				float crackLine1 = 1.0 - min(
					1.0,
					abs(sin(M_PI * (abs(crackUv.x - crackUv.y) + 3.0 * wave))) * 4.0
				);
				float crackLine2 = 1.0 - min(
					1.0,
					abs(sin(M_PI * (abs(crackUv.x + crackUv.y) + 2.0 * wave))) * 4.0
				);
				
				crackLine1 = 1.0 - 0.3 * crackLine1 * crackMask1;
				crackLine2 = crackLine2 * crackMask2;
				
				vec3 cracks = vec3(mix(crackLine1, crackLine2, 0.4));
				
				gl_FragColor = vec4(mix(back, cracks, 0.2), 1.0);
				
			}
		`,
		
		asphalt: `
			void main() {
				
				vec3 uv3 = getUv3(varUv);
				
				vec3 grainColor = texture2D(_grain, varUv * 2.0).xyz;
				grainColor.x *= 0.88;
				grainColor.y *= 0.93;
				
				vec3 mixed = min(vec3(1.0), pow(1.1 * grainColor, vec3(8.0)));
				
				gl_FragColor = vec4(mixed, 1.0);
				
			}
		`,
		
	};
	
	if (typeof process !== 'undefined' && typeof module !== 'undefined' && module.exports) {
		module.exports = examples;
	} else {
		window.texgenExamples = examples;
	}
	
})();