com.talosvfx.talos.runtime.modules.OffsetModule Maven / Gradle / Ivy
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Talos runtime for use in LibGDX projects
/*******************************************************************************
* Copyright 2019 See AUTHORS file.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
******************************************************************************/
package com.talosvfx.talos.runtime.modules;
import com.badlogic.gdx.math.*;
import com.badlogic.gdx.utils.Array;
import com.badlogic.gdx.utils.Json;
import com.badlogic.gdx.utils.JsonValue;
import com.talosvfx.talos.runtime.ScopePayload;
import com.talosvfx.talos.runtime.values.NumericalValue;
import java.util.Comparator;
import java.util.Random;
public class OffsetModule extends AbstractModule {
public static final int ALPHA = 0;
public static final int OUTPUT = 0;
NumericalValue alpha;
NumericalValue output;
NumericalValue lowPos;
NumericalValue lowSize;
NumericalValue highPos;
NumericalValue highSize;
private int lowShape;
private int highShape;
private boolean lowEdge = true;
private boolean highEdge = true;
private float tolerance = 0;
public static final int TYPE_SQUARE = 0;
public static final int TYPE_ELLIPSE = 1;
public static final int TYPE_LINE = 2;
public static final int SIDE_ALL = 0;
public static final int SIDE_TOP = 1;
public static final int SIDE_BOTTOM = 2;
public static final int SIDE_LEFT = 3;
public static final int SIDE_RIGHT = 4;
private int lowSide = SIDE_BOTTOM;
private int highSide = SIDE_RIGHT;
private Vector2 randLow = new Vector2();
private Vector2 randHigh = new Vector2();
private Random random = new Random();
private Rectangle rect = new Rectangle();
private Vector2 tmp = new Vector2();
private Array points;
Comparator comparator = new Comparator() {
@Override
public int compare(Vector2 o1, Vector2 o2) {
if(o1.x < o2.x) return -1;
if(o1.x > o2.x) return 1;
return 0;
}
};
@Override
public void init () {
super.init();
resetPoints();
}
@Override
protected void defineSlots() {
alpha = createInputSlot(ALPHA);
output = createOutputSlot(OUTPUT);
lowPos = new NumericalValue();
lowSize = new NumericalValue();
highPos = new NumericalValue();
highSize = new NumericalValue();
}
@Override
public void processValues() {
processAlphaDefaults();
float alpha = this.alpha.getFloat();
alpha = interpolate(alpha); // apply the curve
// let's find pos by shape
getRandomPosOn(lowSide, lowEdge, lowShape, lowPos, lowSize, randLow);
getRandomPosOn(highSide, highEdge, highShape, highPos, highSize, randHigh);
float x = Interpolation.linear.apply(randLow.x, randHigh.x, alpha);
float y = Interpolation.linear.apply(randLow.y, randHigh.y, alpha);
output.set(x, y);
}
private void getRandomPosOn(int side, boolean edge, int shape, NumericalValue pos, NumericalValue size, Vector2 result) {
random.setSeed((long) ((getScope().getFloat(ScopePayload.PARTICLE_SEED) * 10000 * index * 1000)));
float angle = random.nextFloat();
if(side == SIDE_TOP) angle = angle/2f;
if(side == SIDE_BOTTOM) angle = angle/2f + 0.5f;
if(side == SIDE_LEFT) angle = angle/2f + 0.25f;
if(side == SIDE_RIGHT) angle = angle/2f - 0.25f;
if(shape == TYPE_SQUARE) {
findRandomSquarePos(angle, pos, size, result);
} else if (shape == TYPE_ELLIPSE) {
findRandomEllipsePos(angle, pos, size, result);
} else if (shape == TYPE_LINE){
findRandomLinePos(angle, pos, size, result);
}
float endX = result.x + tolerance;
float endY = result.y + tolerance;
float startX = result.x - tolerance;
float startY = result.y - tolerance;
if(!edge) {
startX = pos.get(0);
startY = pos.get(1);
}
float resultX = random.nextFloat() * (endX - startX) + startX;
float resultY = random.nextFloat() * (endY - startY) + startY;
result.set(resultX, resultY);
}
private void findRandomEllipsePos(float angle, NumericalValue pos, NumericalValue size, Vector2 result) {
angle = angle * 360;
float x = MathUtils.cosDeg(angle) * size.get(0)/2f + pos.get(0);
float y = MathUtils.sinDeg(angle) * size.get(1)/2f + pos.get(1);
result.set(x, y);
}
private void findRandomSquarePos(float angle, NumericalValue pos, NumericalValue size, Vector2 result) {
angle = angle * 360;
rect.set(pos.get(0) - size.get(0)/2f, pos.get(1) - size.get(1)/2f, size.get(0), size.get(1));
intersectSegmentRectangle(pos.get(0), pos.get(1), pos.get(0) + rect.width * MathUtils.cosDeg(angle), pos.get(1) + rect.height * MathUtils.sinDeg(angle), rect, result);
}
private void findRandomLinePos(float angle, NumericalValue pos, NumericalValue size, Vector2 result) {
angle = angle * 360;
rect.set(pos.get(0) - size.get(0)/2f, pos.get(1) - size.get(1)/2f, size.get(0), size.get(1));
tmp.set(rect.width, rect.height); // initial segment vector; for alpha
float alpha = tmp.angle();
float beta = angle - alpha;
float r3 = tmp.set(MathUtils.cosDeg(angle) * rect.width/2f, MathUtils.sinDeg(angle) * rect.height/2f).len();
float r4 = MathUtils.cosDeg(beta) * r3;
float posX = r4 * MathUtils.cosDeg(alpha) + pos.get(0);
float posY = r4 * MathUtils.sinDeg(alpha) + pos.get(1);
result.set(posX, posY);
}
protected void processAlphaDefaults() {
if(alpha.isEmpty()) {
// as default we are going to fetch the lifetime or duration depending on context
float requester = getScope().getFloat(ScopePayload.REQUESTER_ID);
if(requester < 1) {
// particle
alpha.set(getScope().get(ScopePayload.PARTICLE_ALPHA));
alpha.setEmpty(false);
} else if(requester > 1) {
// emitter
alpha.set(getScope().get(ScopePayload.EMITTER_ALPHA));
alpha.setEmpty(false);
} else {
// whaat?
alpha.set(0);
}
}
}
public static boolean intersectSegmentRectangle (float startX, float startY, float endX, float endY, Rectangle rectangle, Vector2 intersection) {
float rectangleEndX = rectangle.x + rectangle.width;
float rectangleEndY = rectangle.y + rectangle.height;
if (Intersector.intersectSegments(startX, startY, endX, endY, rectangle.x, rectangle.y, rectangle.x, rectangleEndY, intersection)) return true;
if (Intersector.intersectSegments(startX, startY, endX, endY, rectangle.x, rectangle.y, rectangleEndX, rectangle.y, intersection)) return true;
if (Intersector.intersectSegments(startX, startY, endX, endY, rectangleEndX, rectangle.y, rectangleEndX, rectangleEndY, intersection))
return true;
if (Intersector.intersectSegments(startX, startY, endX, endY, rectangle.x, rectangleEndY, rectangleEndX, rectangleEndY, intersection))
return true;
return rectangle.contains(startX, startY);
}
private float interpolate(float alpha) {
// interpolate alpha in this point space
if(points.get(0).x >= 0 && alpha <= points.get(0).x) {
return points.get(0).y;
}
for(int i = 0; i < points.size-1; i++) {
Vector2 from = points.get(i);
Vector2 to = points.get(i+1);
if(alpha > from.x && alpha <= to.x) {
float localAlpha = 1f;
if(from.x != to.x) {
localAlpha = (alpha - from.x) / (to.x - from.x);
}
return interpolate(localAlpha, from.x, from.y, to.x, to.y);
}
}
if(points.get(points.size-1).x <= 1f && alpha >= points.get(points.size-1).x) {
return points.get(points.size-1).y;
}
return 0;
}
private float interpolate(float alpha, float x1, float y1, float x2, float y2) {
if(y1 == y2) return y1;
if(x1 == x2) return y1;
tmp.set(x2, y2);
tmp.sub(x1, y1);
tmp.scl(alpha);
tmp.add(x1, y1);
return tmp.y;
}
public void setLowPos(Vector2 pos) {
lowPos.set(pos.x, pos.y);
}
public void getLowPos(Vector2 result) {
result.set(lowPos.get(0), lowPos.get(1));
}
public void getHighPos(Vector2 result) {
result.set(highPos.get(0), highPos.get(1));
}
public void getLowSize(Vector2 result) {
result.set(lowSize.get(0), lowSize.get(1));
}
public void getHighSize(Vector2 result) {
result.set(highSize.get(0), highSize.get(1));
}
public void setLowSize(Vector2 size) {
lowSize.set(size.x, size.y);
}
public void setHighPos(Vector2 pos) {
highPos.set(pos.x, pos.y);
}
public void setHighSize(Vector2 size) {
highSize.set(size.x, size.y);
}
public void setLowShape(int shape) {
lowShape = shape;
}
public void setHighShape(int shape) {
highShape = shape;
}
private void resetPoints() {
// need to guarantee at least one point
points = new Array<>();
Vector2 point = new Vector2(0, 0.5f);
points.add(point);
}
public void setPoints(Array newPoints) {
points.clear();
for(Vector2 point : newPoints) {
Vector2 newPoint = new Vector2(point);
points.add(newPoint);
}
}
public Array getPoints() {
return points;
}
public int createPoint(float x, float y) {
if(x < 0) x = 0;
if(x > 1) x = 1;
if(y < 0) y = 0;
if(y > 1) y = 1;
Vector2 point = new Vector2(x, y);
points.add(point);
sortPoints();
return points.indexOf(point, true);
}
private void sortPoints() {
points.sort(comparator);
}
public void removePoint(int i) {
if(points.size > 1) {
points.removeIndex(i);
}
}
public void setLowEdge(boolean edge) {
lowEdge = edge;
}
public void setHighEdge(boolean edge) {
highEdge = edge;
}
public void setLowSide(int side) {
lowSide = side;
}
public void setHighSide(int side) {
highSide = side;
}
public int getLowShape() {
return lowShape;
}
public int getHighShape() {
return highShape;
}
public boolean getLowEdge() {
return lowEdge;
}
public boolean getHighEdge() {
return highEdge;
}
public int getLowSide() {
return lowSide;
}
public int getHighSide() {
return highSide;
}
@Override
public void read(Json json, JsonValue jsonData) {
super.read(json, jsonData);
points.clear();
final JsonValue points = jsonData.get("points");
for (JsonValue point : points) {
createPoint(point.get(0).asFloat(), point.get(1).asFloat());
}
final JsonValue low = jsonData.get("low");
final JsonValue high = jsonData.get("high");
lowEdge = low.getBoolean("edge");
highEdge = high.getBoolean("edge");
lowShape = low.getInt("shape");
highShape = high.getInt("shape");
lowSide = low.getInt("side");
highSide = high.getInt("side");
final JsonValue lowRect = low.get("rect");
final JsonValue highRect = high.get("rect");
lowPos.set(lowRect.getFloat("x"), lowRect.getFloat("y"));
lowSize.set(lowRect.getFloat("width"), lowRect.getFloat("height"));
highPos.set(highRect.getFloat("x"), highRect.getFloat("y"));
highSize.set(highRect.getFloat("width"), highRect.getFloat("height"));
}
@Override
public void write(Json json) {
super.write(json);
json.writeArrayStart("points");
for (Vector2 point : getPoints()) {
json.writeObjectStart();
json.writeValue("x", point.x);
json.writeValue("y", point.y);
json.writeObjectEnd();
}
json.writeArrayEnd();
json.writeObjectStart("low");
json.writeValue("edge", lowEdge);
json.writeValue("shape", lowShape);
json.writeValue("side", lowSide);
json.writeObjectStart("rect");
json.writeValue("x", lowPos.get(0));
json.writeValue("y", lowPos.get(1));
json.writeValue("width", lowSize.get(0));
json.writeValue("height", lowSize.get(1));
json.writeObjectEnd();
json.writeObjectEnd();
json.writeObjectStart("high");
json.writeValue("edge", highEdge);
json.writeValue("shape", highShape);
json.writeValue("side", highSide);
json.writeObjectStart("rect");
json.writeValue("x", highPos.get(0));
json.writeValue("y", highPos.get(1));
json.writeValue("width", highSize.get(0));
json.writeValue("height", highSize.get(1));
json.writeObjectEnd();
json.writeObjectEnd();
}
}