How do I properly generate cubemaps?

bodqhrohro · May 20, 2019, 3:15pm

When creating a non-cubemap texture, lock() gives me an array of pixels, which I can fill. Though, with a cubemap, it gives an array of 6 nulls, which probably should have been distinct arrays for each face, but they are not. Am I doing something wrong?

will · May 20, 2019, 6:21pm

I suspect that this is just a bug (feature?) in the engine - that you can’t currently initialize cubemaps from anything other than images.

github.com

playcanvas/engine/blob/master/src/graphics/texture.js#L642


}
if (options.face === undefined) {
    options.face = 0;
}
if (options.mode === undefined) {
    options.mode = pc.TEXTURELOCK_WRITE;
}


this._lockedLevel = options.level;


if (this._levels[options.level] === null) {
    switch (this._format) {
        case pc.PIXELFORMAT_A8:
        case pc.PIXELFORMAT_L8:
            this._levels[options.level] = new Uint8Array(this._width * this._height * this._depth);
            break;
        case pc.PIXELFORMAT_L8_A8:
            this._levels[options.level] = new Uint8Array(this._width * this._height *  this._depth * 2);
            break;
        case pc.PIXELFORMAT_R5_G6_B5:
        case pc.PIXELFORMAT_R5_G5_B5_A1:

I don’t see anything there which allocates a pixel array back on the actual face of a level. ‘face’ is an option but is ignored.

Maybe submit a issue on the engine repo on GitHub?