materials.js

// cubemaps
galaxysim.cubemap_path = 'textures/cubemaps/';
galaxysim.milky_way = ['GalaxyTex_PositiveX.jpg',
    'GalaxyTex_NegativeX.jpg',
    'GalaxyTex_PositiveY.jpg',
    'GalaxyTex_NegativeY.jpg',
    'GalaxyTex_PositiveZ.jpg',
    'GalaxyTex_NegativeZ.jpg'
];

galaxysim.light_blue = ['BlueNebular_left.jpg',
    'BlueNebular_right.jpg',
    'BlueNebular_top.jpg',
    'BlueNebular_bottom.jpg',
    'BlueNebular_front.jpg',
    'BlueNebular_back.jpg'
];

galaxysim.blue = ['bkg1_left.jpg',
    'bkg1_right.jpg',
    'bkg1_top.jpg',
    'bkg1_bottom.jpg',
    'bkg1_front.jpg',
    'bkg1_back.jpg'
];

galaxysim.red = ['bkg2_left.jpg',
    'bkg2_right.jpg',
    'bkg2_top.jpg',
    'bkg2_bottom.jpg',
    'bkg2_front.jpg',
    'bkg2_back.jpg'
];

galaxysim.cubemaps_list = [galaxysim.milky_way, galaxysim.light_blue, galaxysim.blue, galaxysim.red];
galaxysim.cubemaps = [];

galaxysim.createAllMaterials = function() {

    function createParticleMaterial(texture, size, color, blending, opacity) {
    	return new THREE.PointCloudMaterial({
    		color: color,
    		opacity: opacity,
		    size: size,
		    map: texture,
		    blending: blending,
		    depthTest: false,
		    transparent: true,
		    vertexColors: THREE.VertexColors
	    });
    }

	var starLargeTexture = THREE.ImageUtils.loadTexture("textures/star_large.png");
	var starSmallTexture = THREE.ImageUtils.loadTexture("textures/star_small.png");
	var gasCloudTexture = THREE.ImageUtils.loadTexture("textures/cloud.png");

	for (var i=0; i < galaxysim.cubemaps_list.length; i++) {
        var cubemap = new THREE.CubeTextureLoader()
            .setPath(galaxysim.cubemap_path)
            .load(galaxysim.cubemaps_list[i]);
        cubemap.format = THREE.RGBFormat;
		galaxysim.cubemaps.push(cubemap);
	}

	return {
		bright: createParticleMaterial(starLargeTexture, 140, 0xffffff, THREE.AdditiveBlending, 0.0),
		brightSmall: createParticleMaterial(starSmallTexture, 80, 0xffffff, THREE.AdditiveBlending, 0.0),
		gasCloud: createParticleMaterial(gasCloudTexture, 900, 0xffffff, THREE.NormalBlending, 0.18)
	}
};