@openhps/core/dist/cjs/three/renderers/webgl/WebGLBufferRenderer.js

Open Hybrid Positioning System - Core component

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.WebGLBufferRenderer = WebGLBufferRenderer;
function WebGLBufferRenderer(gl, extensions, info) {
  let mode;
  function setMode(value) {
    mode = value;
  }
  function render(start, count) {
    gl.drawArrays(mode, start, count);
    info.update(count, mode, 1);
  }
  function renderInstances(start, count, primcount) {
    if (primcount === 0) return;
    gl.drawArraysInstanced(mode, start, count, primcount);
    info.update(count, mode, primcount);
  }
  function renderMultiDraw(starts, counts, drawCount) {
    if (drawCount === 0) return;
    const extension = extensions.get('WEBGL_multi_draw');
    extension.multiDrawArraysWEBGL(mode, starts, 0, counts, 0, drawCount);
    let elementCount = 0;
    for (let i = 0; i < drawCount; i++) {
      elementCount += counts[i];
    }
    info.update(elementCount, mode, 1);
  }
  function renderMultiDrawInstances(starts, counts, drawCount, primcount) {
    if (drawCount === 0) return;
    const extension = extensions.get('WEBGL_multi_draw');
    if (extension === null) {
      for (let i = 0; i < starts.length; i++) {
        renderInstances(starts[i], counts[i], primcount[i]);
      }
    } else {
      extension.multiDrawArraysInstancedWEBGL(mode, starts, 0, counts, 0, primcount, 0, drawCount);
      let elementCount = 0;
      for (let i = 0; i < drawCount; i++) {
        elementCount += counts[i] * primcount[i];
      }
      info.update(elementCount, mode, 1);
    }
  }

  //

  this.setMode = setMode;
  this.render = render;
  this.renderInstances = renderInstances;
  this.renderMultiDraw = renderMultiDraw;
  this.renderMultiDrawInstances = renderMultiDrawInstances;
}