Method RenderTilemap

src/game/map/render_map.cpp:595–754

}

void CRenderMap::RenderTilemap(CTile *pTiles, int w, int h, 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);
	const bool ColorOpaque = Color.a > 254.0f / 255.0f;

	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++)
		{
			int mx = x;
			int my = y;

			if(RenderFlags & TILERENDERFLAG_EXTEND)
			{
				if(mx < 0)
					mx = 0;
				if(mx >= w)
					mx = w - 1;
				if(my < 0)
					my = 0;
				if(my >= h)
					my = h - 1;
			}
			else
			{
				if(mx < 0)
					continue; // mx = 0;
				if(mx >= w)
					continue; // mx = w-1;
				if(my < 0)
					continue; // my = 0;
				if(my >= h)
					continue; // my = h-1;
			}

			int c = mx + my * w;