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add support for a few different billboard types

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Gered 2013-07-01 15:08:27 -04:00
parent c1fd43cd64
commit 9be4661967
2 changed files with 43 additions and 6 deletions
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47
src/com/blarg/gdx/graphics/BillboardSpriteBatch.java
View file

@ -1,10 +1,12 @@
package com.blarg.gdx.graphics;
import com.badlogic.gdx.graphics.Camera;
import com.badlogic.gdx.graphics.Color;
import com.badlogic.gdx.graphics.Texture;
import com.badlogic.gdx.graphics.g2d.TextureRegion;
import com.badlogic.gdx.graphics.g3d.decals.Decal;
import com.badlogic.gdx.graphics.g3d.decals.DecalBatch;
import com.badlogic.gdx.math.Vector3;
import com.badlogic.gdx.utils.Array;
/***
@ -15,12 +17,20 @@ import com.badlogic.gdx.utils.Array;
* </p>
*/
public class BillboardSpriteBatch {
public enum Type {
Spherical,
Cylindrical,
ScreenAligned
}
static final Vector3 temp = new Vector3();
static final int CAPACITY_INCREMENT = 128;
Array<Decal> sprites;
int pointer;
boolean hasBegun;
DecalBatch decalBatch;
Camera camera;
public BillboardSpriteBatch() {
sprites = new Array<Decal>(true, CAPACITY_INCREMENT, Decal.class);
@ -31,22 +41,25 @@ public class BillboardSpriteBatch {
decalBatch = null;
}
public void begin(DecalBatch decalBatch) {
public void begin(DecalBatch decalBatch, Camera camera) {
if (hasBegun)
throw new IllegalStateException("Cannot be called within an existing begin/end block.");
if (decalBatch == null)
throw new IllegalArgumentException();
if (camera == null)
throw new IllegalArgumentException();
this.decalBatch = decalBatch;
this.camera = camera;
hasBegun = true;
pointer = 0;
}
public void draw(Texture texture, float x, float y, float z, float width, float height) {
draw(texture, x, y, z, width, height, Color.WHITE);
public void draw(Type type, Texture texture, float x, float y, float z, float width, float height) {
draw(type, texture, x, y, z, width, height, Color.WHITE);
}
public void draw(Texture texture, float x, float y, float z, float width, float height, Color tint) {
public void draw(Type type, Texture texture, float x, float y, float z, float width, float height, Color tint) {
Decal sprite = nextUsable();
TextureRegion textureRegion = sprite.getTextureRegion();
textureRegion.setRegion(texture);
@ -55,6 +68,7 @@ public class BillboardSpriteBatch {
sprite.setHeight(height);
sprite.setPosition(x, y, z);
sprite.setColor(tint);
rotateDecal(sprite, type);
}
public void flush() {
@ -82,9 +96,32 @@ public class BillboardSpriteBatch {
flush();
hasBegun = false;
decalBatch = null; // don't need to hold on to this particular reference anymore
// don't need to hold on to these references anymore
decalBatch = null;
camera = null;
}
private void rotateDecal(Decal decal, Type type) {
switch (type) {
case Spherical:
decal.lookAt(camera.position, Vector3.Y);
break;
case Cylindrical:
temp.set(camera.position)
.sub(decal.getPosition())
.nor();
temp.y = 0.0f;
decal.setRotation(temp, Vector3.Y);
break;
case ScreenAligned:
temp.set(camera.direction)
.scl(-1.0f, -1.0f, -1.0f); // opposite direction to the camera facing dir (point directly out of the screen)
decal.setRotation(temp, Vector3.Y);
break;
}
}
private void increaseCapacity() {
int newCapacity = sprites.items.length + CAPACITY_INCREMENT;

2
src/com/blarg/gdx/graphics/RenderContext.java
View file

@ -85,7 +85,7 @@ public class RenderContext implements Disposable {
spriteBatch.setProjectionMatrix(orthographicCamera.combined);
debugGeometryRenderer.begin(ShapeRenderer.ShapeType.Line);
delayedSpriteBatch.begin(spriteBatch);
billboardSpriteBatch.begin(decalBatch);
billboardSpriteBatch.begin(decalBatch, perspectiveCamera);
modelBatch.begin(perspectiveCamera);
}