interpolateValues (currentTime, interpolType, time1, time2, value1, value2, valueType){
//Support and use only linear interpolation for now
if (interpolType == 0) {
return value1;
} else if (interpolType >= 1) {
if (valueType == 1 || valueType == 3) {
var result = vec4.create();
quat.slerp(result, value1, value2, (currentTime - time1)/(time2 - time1));
} else {
var diff = vec4.create();
vec4.subtract(diff, value2, value1);
vec4.scale(diff, diff, (currentTime - time1)/(time2 - time1));
var result = vec4.create();
vec4.add(result, value1, diff);
}
return result;
}
}
/**
* Apply color effects to a single pixel
*
* @param {vec4} pixel Values in range [0,1]
* @param {Object} effect
* @param {vec4} effect.colorOffset
* @param {mat4} effect.colorMatrix
* @param {vec4} result Object to store result
*
* @memberof colorEffects
*/
function applyToPixel(pixel, effect, result) {
vec4TransformMat4Transposed(result, pixel, effect.colorMatrix);
vec4.add(result, result, effect.colorOffset);
}