Method RenderTileRectangle

src/game/map/render_map.cpp:435–526

}

void CRenderMap::RenderTileRectangle(int RectX, int RectY, int RectW, int RectH,
	unsigned char IndexIn, unsigned char IndexOut,
	float Scale, ColorRGBA Color, int RenderFlags)
{
	float ScreenX0, ScreenY0, ScreenX1, ScreenY1;
	Graphics()->GetScreen(&ScreenX0, &ScreenY0, &ScreenX1, &ScreenY1);

	// calculate the final pixelsize for the tiles
	float TilePixelSize = 1024 / 32.0f;
	float FinalTileSize = Scale / (ScreenX1 - ScreenX0) * Graphics()->ScreenWidth();
	float FinalTilesetScale = FinalTileSize / TilePixelSize;

	if(Graphics()->HasTextureArraysSupport())
		Graphics()->QuadsTex3DBegin();
	else
		Graphics()->QuadsBegin();
	Graphics()->SetColor(Color);

	int StartY = (int)(ScreenY0 / Scale) - 1;
	int StartX = (int)(ScreenX0 / Scale) - 1;
	int EndY = (int)(ScreenY1 / Scale) + 1;
	int EndX = (int)(ScreenX1 / Scale) + 1;

	// adjust the texture shift according to mipmap level
	float TexSize = 1024.0f;
	float Frac = (1.25f / TexSize) * (1 / FinalTilesetScale);
	float Nudge = (0.5f / TexSize) * (1 / FinalTilesetScale);

	for(int y = StartY; y < EndY; y++)
	{
		for(int x = StartX; x < EndX; x++)
		{
			unsigned char Index = (x >= RectX && x < RectX + RectW && y >= RectY && y < RectY + RectH) ? IndexIn : IndexOut;
			if(Index)
			{
				bool Render = false;
				if(RenderFlags & LAYERRENDERFLAG_TRANSPARENT)
					Render = true;

				if(Render)
				{
					int tx = Index % 16;
					int ty = Index / 16;
					int Px0 = tx * (1024 / 16);
					int Py0 = ty * (1024 / 16);
					int Px1 = Px0 + (1024 / 16) - 1;
					int Py1 = Py0 + (1024 / 16) - 1;

					float x0 = Nudge + Px0 / TexSize + Frac;
					float y0 = Nudge + Py0 / TexSize + Frac;
					float x1 = Nudge + Px1 / TexSize - Frac;
					float y1 = Nudge + Py0 / TexSize + Frac;
					float x2 = Nudge + Px1 / TexSize - Frac;
					float y2 = Nudge + Py1 / TexSize - Frac;
					float x3 = Nudge + Px0 / TexSize + Frac;
					float y3 = Nudge + Py1 / TexSize - Frac;

					if(Graphics()->HasTextureArraysSupport())