pixi-gl-core/src/shader/defaultValue.js

A set of tidy little pixi objects that make working with WebGL simpler

/**
 * @class
 * @memberof PIXI.glCore.shader
 * @param type {String} Type of value
 * @param size {Number}
 */
var defaultValue = function(type, size) 
{
    switch (type)
    {
        case 'float':
            return 0;

        case 'vec2': 
            return new Float32Array(2 * size);

        case 'vec3':
            return new Float32Array(3 * size);

        case 'vec4':     
            return new Float32Array(4 * size);
            
        case 'int':
        case 'sampler2D':
            return 0;

        case 'ivec2':   
            return new Int32Array(2 * size);

        case 'ivec3':
            return new Int32Array(3 * size);

        case 'ivec4': 
            return new Int32Array(4 * size);

        case 'bool':     
            return false;

        case 'bvec2':

            return booleanArray( 2 * size);

        case 'bvec3':
            return booleanArray(3 * size);

        case 'bvec4':
            return booleanArray(4 * size);

        case 'mat2':
            return new Float32Array([1, 0,
                                     0, 1]);

        case 'mat3': 
            return new Float32Array([1, 0, 0,
                                     0, 1, 0,
                                     0, 0, 1]);

        case 'mat4':
            return new Float32Array([1, 0, 0, 0,
                                     0, 1, 0, 0,
                                     0, 0, 1, 0,
                                     0, 0, 0, 1]);
    }
};

var booleanArray = function(size)
{
    var array = new Array(size);

    for (var i = 0; i < array.length; i++) 
    {
        array[i] = false;
    }

    return array;
};

module.exports = defaultValue;