void testAreaShader() { Mercator::Area* a1 = new Mercator::Area(1, false); WFMath::Polygon<2> p; p.addCorner(p.numCorners(), Point2(3, 4)); p.addCorner(p.numCorners(), Point2(10, 10)); p.addCorner(p.numCorners(), Point2(14, 6)); p.addCorner(p.numCorners(), Point2(18, 4)); p.addCorner(p.numCorners(), Point2(17, 19)); p.addCorner(p.numCorners(), Point2(6, 20)); p.addCorner(p.numCorners(), Point2(-1, 18)); p.addCorner(p.numCorners(), Point2(-8, 11)); a1->setShape(p); Mercator::Area* a2 = new Mercator::Area(1, false); WFMath::Polygon<2> p2; p2.addCorner(p2.numCorners(), Point2(25, 18)); p2.addCorner(p2.numCorners(), Point2(72, 22)); p2.addCorner(p2.numCorners(), Point2(60, 30)); p2.addCorner(p2.numCorners(), Point2(27, 28)); p2.addCorner(p2.numCorners(), Point2(25, 45)); p2.addCorner(p2.numCorners(), Point2(3, 41)); p2.addCorner(p2.numCorners(), Point2(-2, 20)); a2->setShape(p2); Mercator::Terrain terrain(Mercator::Terrain::SHADED, 16); Mercator::Shader * base_shader = new Mercator::FillShader(Mercator::Shader::Parameters()); terrain.addShader(base_shader, 0); Mercator::AreaShader* ashade = new Mercator::AreaShader(1); terrain.addShader(ashade, 1); terrain.setBasePoint(0, 0, -1); terrain.setBasePoint(0, 1, 8); terrain.setBasePoint(1, 0, 2); terrain.setBasePoint(1, 1, 11); terrain.setBasePoint(2, 0, 2); terrain.setBasePoint(2, 1, 11); terrain.addArea(a1); // terrain.addArea(a2); Mercator::Segment* seg = terrain.getSegment(0,0); assert(a1->checkIntersects(*seg)); seg->populateSurfaces(); writePGMForSurface("test1.pgm", seg->getSize(), seg->getSurfaces()[1]); seg = terrain.getSegment(1,0); seg->populateSurfaces(); writePGMForSurface("test2.pgm", seg->getSize(), seg->getSurfaces()[1]); }
int main() { Mercator::Terrain t; // Add a null test shader to the terrain Mercator::Shader * shader = new TestShader; t.addShader(shader, 0); // Create a test area with a shape which intersects // the Segment at 0,0 Mercator::Area* a1 = new Mercator::Area(0, false); WFMath::Polygon<2> p; p.addCorner(p.numCorners(), WFMath::Point<2>(3, 4)); p.addCorner(p.numCorners(), WFMath::Point<2>(10, 10)); p.addCorner(p.numCorners(), WFMath::Point<2>(14, 6)); p.addCorner(p.numCorners(), WFMath::Point<2>(18, 4)); p.addCorner(p.numCorners(), WFMath::Point<2>(17, 19)); p.addCorner(p.numCorners(), WFMath::Point<2>(6, 20)); p.addCorner(p.numCorners(), WFMath::Point<2>(-1, 18)); p.addCorner(p.numCorners(), WFMath::Point<2>(-8, 11)); a1->setShape(p); // Add enough base points to force the creation of the Segment at 0,0 t.setBasePoint(0, 0, -1); t.setBasePoint(0, 1, 8); t.setBasePoint(1, 0, 2); t.setBasePoint(1, 1, 11); // Get the Segment at 0,0 Mercator::Segment * seg = t.getSegmentAtIndex(0,0); assert(seg != 0); // Get the surfaces, and add one corresponding to the shader we added. // We need to do this as the functions that would normally make it happen // have been stubbed out. Mercator::Segment::Surfacestore & sss = seg->getSurfaces(); Mercator::Surface * sfce = new Mercator::Surface(*seg, *shader); // Force allocation of the surface buffer so we can check later that it // gets destroyed when the area is added to the terrain. sfce->allocate(); assert(sfce->isValid()); // Add the surface to the store for this segment sss[0] = sfce; // Add the area which should cause relevant surface date to be invalidated t.addArea(a1); // We assert this to ensure that the buffer has been de-allocated // by a call to Surface::invalidate caused by adding the Area. assert(!sfce->isValid()); // force the surface to re-allocate sfce->allocate(); assert(sfce->isValid()); // Modify the areas shape p.addCorner(p.numCorners(), WFMath::Point<2>(-9, 12)); a1->setShape(p); // and cause an area update t.updateArea(a1); // Check the surface has been invalidated again assert(!sfce->isValid()); // force the surface to re-allocate sfce->allocate(); assert(sfce->isValid()); t.removeArea(a1); // Check the surface has been invalidated again assert(!sfce->isValid()); }