C++ (Cpp) Brush::Bind Examples

Example #1

File: GLShapeRenderer.cpp Project: PhilColbert/LK8000

void GLShapeRenderer::renderPolygon(LKSurface& Surface, const XShape& shape, Brush& brush, const ScreenProjection& _Proj) {
  /*
   OpenGL cannot draw complex polygons so we need to use a Tessallator to draw the polygon using a GL_TRIANGLE_FAN
   */  
#ifdef USE_GLSL
  OpenGL::solid_shader->Use();
#endif
  
  brush.Bind();
    
  std::unique_ptr<const GLBlend> blend; 
  if(!brush.IsOpaque()) {
    blend = std::make_unique<const GLBlend>(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
  }
  
  curr_LabelPos = clipRect.GetBottomRight();
  
  const shapeObj& shp = shape.shape;

  gluTessBeginPolygon(tess, this );
  for (int j = 0; j < shp.numlines; j++) {
    gluTessBeginContour(tess);
    for (int i = 0; i < shp.line[j].numpoints; i++) {
      const RasterPoint pt = _Proj.LonLat2Screen(shp.line[j].point[i]);
      if (!noLabel &&  (pt.x<=curr_LabelPos.x)) {
        curr_LabelPos = pt;
      }  
      vertex_t& vertex = *(pointers.insert(pointers.end(), vertex_t({{(GLdouble)pt.x, (GLdouble)pt.y, 0.}})));
      gluTessVertex(tess, vertex.data(), vertex.data());
    }
    gluTessEndContour(tess);
  }
  gluTessEndPolygon(tess);
  
  if(shape.HasLabel() && clipRect.IsInside(curr_LabelPos)) {
    shape.renderSpecial(Surface, curr_LabelPos.x, curr_LabelPos.y, clipRect);
  }
  
  pointers.clear();
}