Rogue: Savage Rats, a retro-themed dungeon crawler
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rogue-savage-rats/src/mightypork/rogue/world/tile/renderers/BasicTileRenderer.java

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package mightypork.rogue.world.tile.renderers;
import mightypork.gamecore.render.Render;
import mightypork.gamecore.render.textures.TxQuad;
import mightypork.gamecore.render.textures.TxSheet;
import mightypork.rogue.Res;
import mightypork.rogue.world.level.render.TileRenderContext;
import mightypork.rogue.world.tile.Tile;
import mightypork.util.math.constraints.rect.Rect;
public class BasicTileRenderer extends TileRenderer {
private final TxSheet sheet;
private static boolean inited;
private static TxQuad SH_N, SH_S, SH_E, SH_W, SH_NW, SH_NE, SH_SW, SH_SE;
public BasicTileRenderer(String sheetKey)
{
this.sheet = Res.getTxSheet(sheetKey);
if (!inited) {
SH_N = Res.getTxQuad("tile16.shadow.n");
SH_S = Res.getTxQuad("tile16.shadow.s");
SH_E = Res.getTxQuad("tile16.shadow.e");
SH_W = Res.getTxQuad("tile16.shadow.w");
SH_NW = Res.getTxQuad("tile16.shadow.nw");
SH_NE = Res.getTxQuad("tile16.shadow.ne");
SH_SW = Res.getTxQuad("tile16.shadow.sw");
SH_SE = Res.getTxQuad("tile16.shadow.se");
}
}
@Override
public void render(TileRenderContext context)
{
final Rect rect = context.getRect();
Render.quadTextured(rect, sheet.getRandomQuad(context.getTileNoise()));
final Tile t = context.getTile();
if (t.getModel().doesCastShadow()) return; // no shadows for wall
Tile t2;
if (!t.shadowsComputed) {
// no shadows computed yet
t.shadows = 0; // reset the mask
int move = 0;
for (int y = -1; y <= 1; y++) {
for (int x = -1; x <= 1; x++) {
if (x == 0 && y == 0) continue;
t2 = context.getAdjacentTile(x, y);
if (t2.getModel().doesCastShadow()) {
t.shadows |= 1 << move;
}
move++;
}
}
t.shadowsComputed = true;
}
if (t.shadows == 0) return;
if ((t.shadows & (1 << 0)) != 0) Render.quadTextured(rect, SH_NW);
if ((t.shadows & (1 << 1)) != 0) Render.quadTextured(rect, SH_N);
if ((t.shadows & (1 << 2)) != 0) Render.quadTextured(rect, SH_NE);
if ((t.shadows & (1 << 3)) != 0) Render.quadTextured(rect, SH_W);
if ((t.shadows & (1 << 4)) != 0) Render.quadTextured(rect, SH_E);
if ((t.shadows & (1 << 5)) != 0) Render.quadTextured(rect, SH_SW);
if ((t.shadows & (1 << 6)) != 0) Render.quadTextured(rect, SH_S);
if ((t.shadows & (1 << 7)) != 0) Render.quadTextured(rect, SH_SE);
}
}