Method _packField

src/webgpu/p5.RendererWebGPU.js:2077–2115

(field, value, floatView, dataView, baseOffset)

    //
    // value: number or number[] - the data to write
    _packField(field, value, floatView, dataView, baseOffset) {
      if (value === undefined) return;

      // Duck typing instead of instanceof to avoid importing a separate
      // copy of the Color/Vector classes
      if (value?.isVector) {
        value = value.values.length !== value.dimensions ? value.values.slice(0, value.dimensions) : value.values;
      } else if (value?.isColor) {
        value = value._getRGBA([1, 1, 1, 1]);
      }
      const byteOffset = baseOffset + field.offset;
      if (field.baseType === 'u32') {
        if (field.size === 4) {
          dataView.setUint32(byteOffset, value, true);
        } else {
          for (let i = 0; i < value.length; i++) {
            dataView.setUint32(byteOffset + i * 4, value[i], true);
          }
        }
      } else if (field.baseType === 'i32') {
        if (field.size === 4) {
          dataView.setInt32(byteOffset, value, true);
        } else {
          for (let i = 0; i < value.length; i++) {
            dataView.setInt32(byteOffset + i * 4, value[i], true);
          }
        }
      } else if (field.packInPlace) {
        // In-place packing for mat3: write directly to buffer with padding
        const base = byteOffset / 4;
        floatView[base + 0] = value[0]; floatView[base + 1] = value[1]; floatView[base + 2] = value[2];
        floatView[base + 4] = value[3]; floatView[base + 5] = value[4]; floatView[base + 6] = value[5];
        floatView[base + 8] = value[6]; floatView[base + 9] = value[7]; floatView[base + 10] = value[8];
      } else if (field.size === 4) {
        floatView.set([value], byteOffset / 4);
      } else {
        floatView.set(value, byteOffset / 4);
      }
    }

    _packUniformGroup(shader, groupUniforms, bufferInfo) {
      // Pack a single group's uniforms into a buffer