Method update

src/effects/ShockWaveEffect.js:258–301

* Updates this effect. * * @param {WebGLRenderer} renderer - The renderer. * @param {WebGLRenderTarget} inputBuffer - A frame buffer that contains the result of the previous pass. * @param {Number} [delta] - The time between the last frame and the current one in seconds.

(renderer, inputBuffer, delta)

	 */

	update(renderer, inputBuffer, delta) {

		const position = this.position;
		const camera = this.camera;
		const uniforms = this.uniforms;
		const uActive = uniforms.get("active");

		if(this.active) {

			const waveSize = uniforms.get("waveSize").value;

			// Calculate direction vectors.
			camera.getWorldDirection(v);
			ab.copy(camera.position).sub(position);

			// Don't render the effect if the object is behind the camera.
			uActive.value = (v.angleTo(ab) > HALF_PI);

			if(uActive.value) {

				// Scale the effect based on distance to the object.
				uniforms.get("cameraDistance").value = camera.position.distanceTo(position);

				// Calculate the screen position of the shock wave.
				v.copy(position).project(camera);
				this.screenPosition.set((v.x + 1.0) * 0.5, (v.y + 1.0) * 0.5);

			}

			// Update the shock wave radius based on time.
			this.time += delta * this.speed;
			const radius = this.time - waveSize;
			uniforms.get("radius").value = radius;

			if(radius >= (uniforms.get("maxRadius").value + waveSize) * 2.0) {

				this.active = false;
				uActive.value = false;

			}

		}

	}

}