usage

gistfile1.txt

		terrain_shader = new TerraFrame.TerrainShader({
			uniforms: [
				{ name: 'sunlight_dir', type: 'v3', value: new THREE.Vector3( -.5, .8, .7 ) }
			],
			textures: [
				{ name: 'grass', asset: 'terrain.grass', repeat: new THREE.Vector2( 2, 2 ) },
				{ name: 'rock', asset: 'terrain.rock', repeat: new THREE.Vector2( 3, 3 ) },
				{ name: 'sand', asset: 'terrain.sand', repeat: new THREE.Vector2( 2, 2 ) }
			],
			pieces: [
					'vec4 fogofwar = vec4(0.0, 0.0, 0.0, 1.0);',
					'gl_FragColor = vec4(rock.rgb, 1.0);',
					TerraFrame.TerrainShader.Chunks.strata({
						texture: 'sand',
						elevation: {
							max: -1,
							fade: 2
						},
						slope: {
							max: Math.PI/4,
							fade: Math.PI/8
						},
					}),
					TerraFrame.TerrainShader.Chunks.strata({
						texture: 'grass',
						elevation: {
							min: -3,
							fade: 2
						},
						slope: {
							max: Math.PI/4,
							fade: Math.PI/8
						},
					}),
					TerraFrame.TerrainShader.Chunks.pervertexTextures(['fogofwar']),
					TerraFrame.TerrainShader.Chunks.sunlight,
			],
			pervertex_textures: ['fogofwar']
		});