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add large tile support in the swept sphere collision implementation

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Gered 2013-12-31 14:32:17 -05:00
parent e6e8c27f21
commit 9489fcf429
1 changed files with 27 additions and 5 deletions
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32
src/main/java/ca/blarg/gdx/tilemap3d/TileMapSweptSphereCollisionChecker.java
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@ -1,13 +1,13 @@
package ca.blarg.gdx.tilemap3d; package ca.blarg.gdx.tilemap3d;
import ca.blarg.gdx.tilemap3d.tilemesh.TileMesh;
import com.badlogic.gdx.math.Matrix4;
import com.badlogic.gdx.math.Vector3;
import com.badlogic.gdx.math.collision.BoundingBox;
import ca.blarg.gdx.math.SweptSphere; import ca.blarg.gdx.math.SweptSphere;
import ca.blarg.gdx.math.SweptSphereCollisionTester; import ca.blarg.gdx.math.SweptSphereCollisionTester;
import ca.blarg.gdx.math.SweptSphereWorldCollisionChecker; import ca.blarg.gdx.math.SweptSphereWorldCollisionChecker;
import ca.blarg.gdx.tilemap3d.tilemesh.TileMesh; import ca.blarg.gdx.tilemap3d.tilemesh.TileMesh;
import com.badlogic.gdx.math.Matrix4;
import com.badlogic.gdx.math.Vector3;
import com.badlogic.gdx.math.collision.BoundingBox;
import com.badlogic.gdx.utils.ObjectSet;
public class TileMapSweptSphereCollisionChecker implements SweptSphereWorldCollisionChecker { public class TileMapSweptSphereCollisionChecker implements SweptSphereWorldCollisionChecker {
static final TileCoord min = new TileCoord(); static final TileCoord min = new TileCoord();
@ -21,6 +21,8 @@ public class TileMapSweptSphereCollisionChecker implements SweptSphereWorldColli
public final TileCoord lastCollisionTilePosition = new TileCoord(); public final TileCoord lastCollisionTilePosition = new TileCoord();
final ObjectSet<Tile> checkedLargeTiles = new ObjectSet<Tile>(32);
@Override @Override
public boolean checkForCollisions(SweptSphere sphere, BoundingBox possibleCollisionArea) { public boolean checkForCollisions(SweptSphere sphere, BoundingBox possibleCollisionArea) {
if (tileMap == null) if (tileMap == null)
@ -44,13 +46,31 @@ public class TileMapSweptSphereCollisionChecker implements SweptSphereWorldColli
// only check solid tiles // only check solid tiles
if (tile.isCollideable()) { if (tile.isCollideable()) {
int worldPosX = x - (int)tile.parentTileOffsetX;
int worldPosY = y - (int)tile.parentTileOffsetY;
int worldPosZ = z - (int)tile.parentTileOffsetZ;
// if this is a large tile, get the parent tile and make sure we haven't already checked
// for collisions against it
if (tile.isLargeTile()) {
Tile parentTile;
if (tile.isLargeTileRoot())
parentTile = tile;
else
parentTile = tileMap.get(worldPosX, worldPosY, worldPosZ);
boolean needToCheck = checkedLargeTiles.add(parentTile);
if (!needToCheck)
continue; // don't check it again!
}
// check each triangle in this tile's mesh // check each triangle in this tile's mesh
TileMesh mesh = tileMap.tileMeshes.get(tile); TileMesh mesh = tileMap.tileMeshes.get(tile);
Vector3[] vertices = mesh.getCollisionVertices(); Vector3[] vertices = mesh.getCollisionVertices();
// world position of this tile, will be used to move each // world position of this tile, will be used to move each
// mesh triangle into world space // mesh triangle into world space
tileWorldPosition.set(x, y, z); tileWorldPosition.set(worldPosX, worldPosY, worldPosZ);
// also add the global TileMesh offset so the mesh is within // also add the global TileMesh offset so the mesh is within
// 0,0,0 to 1,1,1 and not -0.5,-0.5,-0.5 to 0.5,0.5,0.5 // 0,0,0 to 1,1,1 and not -0.5,-0.5,-0.5 to 0.5,0.5,0.5
@ -96,6 +116,8 @@ public class TileMapSweptSphereCollisionChecker implements SweptSphereWorldColli
} }
} }
checkedLargeTiles.clear();
return foundCollision; return foundCollision;
} }
} }