Method addGeometry

src/webgl/GeometryBuilder.js:56–121

* @private * Adds a p5.Geometry to the builder's combined geometry, flattening * transformations.

(input)

   * transformations.
   */
  addGeometry(input) {
    this.hasTransform = !this.renderer.states.uModelMatrix.mat4
      .every((v, i) => v === this.identityMatrix.mat4[i]);

    if (this.hasTransform) {
      this.renderer.scratchMat3.inverseTranspose4x4(
        this.renderer.states.uModelMatrix
      );
    }

    let startIdx = this.geometry.vertices.length;
    for (const v of this.transformVertices(input.vertices)) {
      this.geometry.vertices.push(v);
    }
    for (const vn of this.transformNormals(input.vertexNormals)) {
      this.geometry.vertexNormals.push(vn);
    }
    for (const val of input.uvs) {
      this.geometry.uvs.push(val);
    }

    const inputUserVertexProps = input.userVertexProperties;
    const builtUserVertexProps = this.geometry.userVertexProperties;
    const numPreviousVertices =
      this.geometry.vertices.length - input.vertices.length;

    for (const propName in builtUserVertexProps){
      if (propName in inputUserVertexProps){
        continue;
      }
      const prop = builtUserVertexProps[propName];
      const size = prop.getDataSize();
      const numMissingValues = size * input.vertices.length;
      const missingValues = Array(numMissingValues).fill(0);
      prop.pushDirect(missingValues);
    }
    for (const propName in inputUserVertexProps){
      const prop = inputUserVertexProps[propName];
      const data = prop.getSrcArray();
      const size = prop.getDataSize();
      if (numPreviousVertices > 0 && !(propName in builtUserVertexProps)){
        const numMissingValues = size * numPreviousVertices;
        const missingValues = Array(numMissingValues).fill(0);
        this.geometry.vertexProperty(propName, missingValues, size);
      }
      this.geometry.vertexProperty(propName, data, size);
    }

    if (this.renderer.states.fillColor) {
      this.geometry.faces.push(
        ...input.faces.map(f => f.map(idx => idx + startIdx))
      );
    }
    if (this.renderer.states.strokeColor) {
      for (const edge of input.edges.map(edge => edge.map(idx => idx + startIdx))) {
        this.geometry.edges.push(edge);
      }
    }