Using more than one texture

Newbie & Debugging Questions
#1

I am trying to use more than one texture image when drawing tiles to my game screen.
I have a map file with 1’s and 0’s which correspond to the 2 textures i have.

I created an array of two slick2d textures, like so: Texture[2] tex; …And loaded the into tex[0] and tex[1].
When i load the map file to an array and then try passing the texture with the array index being the current index of the map array which passes either 1 or 0 as the texture index.

		
for (int yTile = 0; yTile < 640 / 64; yTile++) {
	for (int xTile = 0; xTile < 768 / 64; xTile++) {
		int i = 0;
		Tile tile = (Tile)tiles.get(i);
		tile.render(tex[map[i]], xTile * Tile.TILE_WIDTH, yTile * Tile.TILE_HEIGHT);
		i++;
	}
}

All i get is one of the tile textures rendered.

Here is the tile class’s render method:


	public void render(Texture bindTex, int xOff, int yOff) {
		bindTex.bind();
		glBegin(GL_QUADS);
			glTexCoord2f(0.0f, 0.0f);
			glVertex2i(xOff, yOff);
			glTexCoord2f(1.0f, 0.0f);
			glVertex2i(xOff + TILE_WIDTH, yOff);
			glTexCoord2f(1.0f, 1.0f);
			glVertex2i(xOff +TILE_WIDTH, yOff + TILE_HEIGHT);
			glTexCoord2f(0.0f, 1.0f);
			glVertex2i(xOff, yOff +TILE_HEIGHT);
		glEnd();
	}

What is happening?

#2

You aren’t drawing with the second texture. The variable i is always 0, as you never use it when it is 1. >_>

#3

I don’t quite get what you mean, how am I not using the second texture?

#4 
for (int xTile = 0; xTile < 768 / 64; xTile++) {
      int i = 0;
      Tile tile = (Tile)tiles.get(i);
      tile.render(tex[map[i]], xTile * Tile.TILE_WIDTH, yTile * Tile.TILE_HEIGHT);
      i++;
   }

He’s talking about this i = 0; You’re establishing an int i = 0; then incrementing it at the end of the loop… then when the loop restarts you recreate it at 0 :smiley: you need to put the int i = 0 elsewhere, probably at the very beginning of the method (haven’t read it all)

#5

Faaaaaark I’ve been looking at that loop for ages and still didnt see it.
Thanks for your help.

#6

also, your drawing one quad for every tile
very slow with many tiles

maybe it doesnt matter to you; but if you experience performance issues - just so you know

#7

rookie error mate

#8

Interesting first post…

Mike

#9

i’ll be contributing in due time, don’t you worry :wink:
i’m researching networking atm, then moving onto Java 2D.
I’ve been messing with 2D side scrollers and pokemon styled games but decided i want to progress further.
haha, i’ve been reading this forum for a while and forgot to register. my name will be known… hopefully :slight_smile: