method renderTriangleMesh

Source

@override
void renderTriangleMesh(
    RenderState renderState,
    Int16List ixList, Float32List vxList, int color) {

  var context = _renderingContext;
  var matrix = renderState.globalMatrix;
  var alpha = renderState.globalAlpha;
  var blendMode = renderState.globalBlendMode;

  if (_activeAlpha != alpha) {
    _activeAlpha = alpha;
    context.globalAlpha = alpha;
  }

  if (_activeBlendMode != blendMode) {
    _activeBlendMode = blendMode;
    context.globalCompositeOperation = blendMode.compositeOperation;
  }

  context.setTransform(matrix.a, matrix.b, matrix.c, matrix.d, matrix.tx, matrix.ty);
  context.beginPath();

  for(int i = 0; i < ixList.length - 2; i += 3) {
    int i0 = ixList[i + 0] << 1;
    int i1 = ixList[i + 1] << 1;
    int i2 = ixList[i + 2] << 1;
    num x1 = vxList[i0 + 0];
    num y1 = vxList[i0 + 1];
    num x2 = vxList[i1 + 0];
    num y2 = vxList[i1 + 1];
    num x3 = vxList[i2 + 0];
    num y3 = vxList[i2 + 1];
    context.moveTo(x1, y1);
    context.lineTo(x2, y2);
    context.lineTo(x3, y3);
  }

  context.fillStyle = color2rgba(color);
  context.fill();
}