Source: lib/xutils/shaders/testpoint.glsl.js

/** get shader of gl_point for debugging
 * @param {object=} paras paras.vert_scale [optional] number scale of vertices
 * @return {object} {vertexShader, fragmentShader}
 * @member xglsl.testPoint
 * @function
 */
export function testPoint(paras = {}) {
 return { vertexShader: `
  void main() {
    gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );
    gl_PointSize = 3.0 * ${paras.vert_scale || '1.0'}; }`,
 fragmentShader: `
  void main() { gl_FragColor = vec4( 1., 1., 0., 1. ); }`
 };
}