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Tweaks to player debris creation

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Reduced explosion direction variation and max angular velocity so it's
more apparent that the lines were from the original ship.

Removed subtraction then adding back of player position from getLineModels

Formatting + comments.
This commit is contained in:
Matt Low 2020-01-29 12:48:44 +04:00
parent 0d323a69bc
commit d140959fdc
1 changed files with 22 additions and 20 deletions
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34
core/src/com/me/asteroids/EntityFactory.java
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@ -68,30 +68,28 @@ public class EntityFactory {
private static LineModel[] getLineModels(Model playerModel) { private static LineModel[] getLineModels(Model playerModel) {
float[] vertices = playerModel.getVertices(); float[] vertices = playerModel.getVertices();
Vector2 position = playerModel.getPosition();
LineModel[] models = new LineModel[(vertices.length / 2)]; LineModel[] models = new LineModel[(vertices.length / 2)];
for (int i = 0, n = vertices.length; i < n; i += 2) { for (int aIndex = 0, n = vertices.length; aIndex < n; aIndex += 2) {
int bIndex = i + 2 == n? 0 : i + 2; int bIndex = (aIndex + 2 == n) ? 0 : (aIndex + 2);
// tmpA, tmpB = points relative to 0 tmpA.set(vertices[aIndex], vertices[aIndex + 1]);
tmpA.set(vertices[i] - position.x, vertices[i + 1] - position.y); tmpB.set(vertices[bIndex], vertices[bIndex + 1]);
tmpB.set(vertices[bIndex] - position.x, vertices[bIndex + 1] - position.y);
tmp.set(tmpB).sub(tmpA).scl(0.5f); // Cut line segment in half tmp.set(tmpB).sub(tmpA).scl(0.5f);
tmp2.set(tmpA).add(tmp); // Find center of line segment tmp2.set(tmpA).add(tmp); // tmp2 = center of line segment
tmpA.sub(tmp2); // make tmpA, tmpB relative to line center tmpA.sub(tmp2); // make tmpA, tmpB relative to line center
tmpB.sub(tmp2); tmpB.sub(tmp2);
LineModel model = new LineModel(Color.WHITE); LineModel model = new LineModel(playerModel.getColor());
model.setVertices(new float[]{ model.setVertices(new float[]{
tmpA.x, tmpA.y, tmpA.x, tmpA.y,
tmpB.x, tmpB.y, tmpB.x, tmpB.y,
}); });
model.setPosition(tmp2.add(position)); // Offset position to new line center model.setPosition(tmp2); // Position = line center
models[i / 2] = model; models[aIndex / 2] = model;
} }
return models; return models;
} }
@ -100,7 +98,7 @@ public class EntityFactory {
Vector2 playerVelocity = player.getComponent(VelocityComponent.class).velocity; Vector2 playerVelocity = player.getComponent(VelocityComponent.class).velocity;
PositionComponent playerPosition = player.getComponent(PositionComponent.class); PositionComponent playerPosition = player.getComponent(PositionComponent.class);
LineModel[] models = getLineModels(player.getComponent(ModelComponent.class).model); LineModel[] models = getLineModels(player.getComponent(ModelComponent.class).model);
Vector2 explosionCenter = tmp.set(playerPosition.position).sub(Utils.setUnitVectorAngle(tmp2, playerPosition.rotation).scl(10)); Vector2 explosionCenter = tmp.set(playerPosition.position).sub(Utils.setUnitVectorAngle(tmp2, playerPosition.rotation).scl(5));
Entity[] entities = new Entity[models.length]; Entity[] entities = new Entity[models.length];
for (int i = 0, n = models.length; i < n; i++) { for (int i = 0, n = models.length; i < n; i++) {
@ -108,13 +106,17 @@ public class EntityFactory {
model.model = models[i]; model.model = models[i];
PositionComponent position = new PositionComponent(); PositionComponent position = new PositionComponent();
position.position = model.model.getPosition(); position.position = new Vector2(model.model.getPosition());
position.rotation = 90; position.rotation = 90;
VelocityComponent velocity = new VelocityComponent(); VelocityComponent velocity = new VelocityComponent();
velocity.velocity = new Vector2(models[i].getPosition()).sub(explosionCenter).nor().rotate(rand.nextFloat(-45,45)).scl(rand.nextFloat(75,100)); velocity.velocity = new Vector2(models[i].getPosition())
velocity.velocity.add(tmp2.set(playerVelocity).scl(0.75f)); .sub(explosionCenter)
velocity.angularVelocity = rand.nextFloat(-360, 360); .nor() // Direction from explosion center to center of piece
.rotate(rand.nextFloat(-15, 15)) // Slightly alter the direction each piece flies off in
.scl(rand.nextFloat(75, 100)) // Give each piece a slightly different speed
.add(tmp2.set(playerVelocity).scl(0.75f)); // Maintain 75% of the player's velocity at impact
velocity.angularVelocity = rand.nextFloat(-60, 60); // Make each piece spin at a different rate
Entity entity = createEntity(engine); Entity entity = createEntity(engine);
entity.addComponent(position); entity.addComponent(position);