Method _initMatrices

docs/app/js/sanddance-app.js:80119–80141

()

        Object.freeze(this);
    }
    _initMatrices() {
        const { width , height , projectionMatrix , viewMatrix  } = this;
        const vpm = (0, _mathUtils.createMat4)();
        _mat4.multiply(vpm, vpm, projectionMatrix);
        _mat4.multiply(vpm, vpm, viewMatrix);
        this.viewProjectionMatrix = vpm;
        const m = (0, _mathUtils.createMat4)();
        _mat4.scale(m, m, [
            width / 2,
            -height / 2,
            1
        ]);
        _mat4.translate(m, m, [
            1,
            -1,
            0
        ]);
        _mat4.multiply(m, m, vpm);
        const mInverse = _mat4.invert((0, _mathUtils.createMat4)(), m);
        if (!mInverse) throw new Error("Pixel project matrix not invertible");
        this.pixelProjectionMatrix = m;
        this.pixelUnprojectionMatrix = mInverse;
    }
    projectFlat(lngLat) {
        return (0, _webMercatorUtils.lngLatToWorld)(lngLat);
    }