Java tutorial
/* * * The MIT License (MIT) * * Copyright (c) <2015> <Andreas Modahl> * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. * */ package org.ams.testapps.prettypaint; import com.badlogic.gdx.ApplicationAdapter; import com.badlogic.gdx.Gdx; import com.badlogic.gdx.InputProcessor; import com.badlogic.gdx.graphics.Color; import com.badlogic.gdx.graphics.GL20; import com.badlogic.gdx.graphics.OrthographicCamera; import com.badlogic.gdx.graphics.Texture; import com.badlogic.gdx.graphics.g2d.TextureRegion; import com.badlogic.gdx.math.Vector2; import com.badlogic.gdx.physics.box2d.BodyDef; import com.badlogic.gdx.utils.Array; import org.ams.core.Util; import org.ams.paintandphysics.things.PPCircle; import org.ams.paintandphysics.things.PPPolygon; import org.ams.paintandphysics.world.PPWorld; import org.ams.physics.things.Circle; import org.ams.physics.things.Polygon; import org.ams.physics.things.def.CircleDef; import org.ams.physics.things.def.PolygonDef; import org.ams.prettypaint.OutlinePolygon; import org.ams.prettypaint.PrettyPolygonBatch; import org.ams.prettypaint.SaveAsPng; import org.ams.prettypaint.TexturePolygon; /** * This is a test for the {@link SaveAsPng} class. */ public class SaveThingAsPng extends ApplicationAdapter implements InputProcessor { // It is best to use a OrthographicCamera with PrettyPaint OrthographicCamera camera; // some variables used for controlling the camera Vector2 lastWorldTouchDown; Vector2 cameraPositionAtLastWorldTouch; PrettyPolygonBatch polygonBatch; PPWorld world; Texture texture; PPPolygon square; PPCircle circle; PPPolygon polygon; @Override public void dispose() { if (polygonBatch != null) polygonBatch.dispose(); if (texture != null) texture.dispose(); } @Override public void create() { Gdx.gl.glBlendFunc(GL20.GL_SRC_ALPHA, GL20.GL_ONE_MINUS_SRC_ALPHA); Gdx.input.setInputProcessor(this); float w = Gdx.graphics.getWidth(); float h = Gdx.graphics.getHeight(); camera = new OrthographicCamera(10, 10 * (h / w)); polygonBatch = new PrettyPolygonBatch(); world = new PPWorld(); texture = new Texture("skulls.png"); texture.setFilter(Texture.TextureFilter.Linear, Texture.TextureFilter.Linear); square = addSquare(texture); circle = addCircle(texture); polygon = addPolygon(texture); } private PPCircle addCircle(Texture texture) { // make a moving circle with texture and outlines PPCircle circle = new PPCircle(); // add box2d circle CircleDef def = new CircleDef(); circle.setPhysicsThing(new Circle(def)); // add texture TexturePolygon texturePolygon = new TexturePolygon(); texturePolygon.setTextureRegion(new TextureRegion(texture)); circle.setTexturePolygon(texturePolygon); // add outline OutlinePolygon outlinePolygon = new OutlinePolygon(); circle.getOutlinePolygons().add(outlinePolygon); // set properties of all 3 float radius = 0.25f; circle.setRadius(radius); circle.setVertexCount(30); circle.setPosition(0, 5); world.addThing(circle); return circle; } private PPPolygon addSquare(Texture texture) { // make a moving square with texture and outlines PPPolygon square = new PPPolygon(); // add box2d polygon PolygonDef def = new PolygonDef(); def.type = BodyDef.BodyType.StaticBody; square.setPhysicsThing(new Polygon(def)); // add texture TexturePolygon texturePolygon = new TexturePolygon(); texturePolygon.setTextureRegion(new TextureRegion(texture)); square.setTexturePolygon(texturePolygon); // add outline OutlinePolygon outlinePolygon = new OutlinePolygon(); square.getOutlinePolygons().add(outlinePolygon); // set properties of all 3 float hw = 0.25f; float hh = 0.25f; Array<Vector2> vertices = new Array<Vector2>(); vertices.add(new Vector2(-hw, -hh)); vertices.add(new Vector2(hw, -hh)); vertices.add(new Vector2(hw, hh)); vertices.add(new Vector2(-hw, hh)); square.setVertices(vertices); square.setPosition(0, 0); world.addThing(square); return square; } private PPPolygon addPolygon(Texture texture) { // make a moving square with texture and outlines PPPolygon square = new PPPolygon(); // add box2d polygon PolygonDef def = new PolygonDef(); def.type = BodyDef.BodyType.StaticBody; square.setPhysicsThing(new Polygon(def)); // add texture TexturePolygon texturePolygon = new TexturePolygon(); texturePolygon.setTextureRegion(new TextureRegion(texture)); square.setTexturePolygon(texturePolygon); // add outline OutlinePolygon outlinePolygon = new OutlinePolygon(); square.getOutlinePolygons().add(outlinePolygon); // set properties of all 3 Array<Vector2> vertices = new Array<Vector2>(); vertices.add(new Vector2(0, 0)); vertices.add(new Vector2(1, 0)); vertices.add(new Vector2(1, 0.5f)); vertices.add(new Vector2(1.5f, 1.5f)); vertices.add(new Vector2(0.5f, 1)); Util.translateSoCentroidIsAtOrigin(vertices); square.setVertices(vertices); square.setPosition(0, 0); world.addThing(square); return square; } int i = 0; @Override public void render() { Gdx.gl20.glClearColor(1, 1, 1, 1); Gdx.gl20.glClear(GL20.GL_COLOR_BUFFER_BIT); float delta = Gdx.graphics.getDeltaTime(); polygonBatch.begin(camera); world.step(delta); world.draw(polygonBatch); polygonBatch.end(); if (i++ == 4) { SaveAsPng.saveAsPng(square.getTexturePolygon(), square.getOutlinePolygons(), polygonBatch, "square", 1f); SaveAsPng.saveAsPng(circle.getTexturePolygon(), circle.getOutlinePolygons(), polygonBatch, "circle", 1f); SaveAsPng.saveAsPng(polygon.getTexturePolygon(), polygon.getOutlinePolygons(), polygonBatch, "polygon", 1f); } } // Everything below here is just for controlling the camera @Override public void resize(int width, int height) { camera.setToOrtho(false, 10, 10 * ((float) height / (float) width)); camera.position.x = 0; camera.position.y = 0; camera.update(); } @Override public boolean keyDown(int keycode) { return false; } @Override public boolean keyUp(int keycode) { return false; } @Override public boolean keyTyped(char character) { return false; } @Override public boolean touchDown(int screenX, int screenY, int pointer, int button) { lastWorldTouchDown = getPositionOfTouch(screenX, screenY); cameraPositionAtLastWorldTouch = new Vector2(camera.position.x, camera.position.y); return true; } @Override public boolean touchUp(int screenX, int screenY, int pointer, int button) { return false; } @Override public boolean touchDragged(int screenX, int screenY, int pointer) { if (cameraPositionAtLastWorldTouch == null) return false; if (lastWorldTouchDown == null) return false; Vector2 worldTouchDrag = getPositionOfTouch(screenX, screenY); Vector2 pos = new Vector2(cameraPositionAtLastWorldTouch).sub(worldTouchDrag).add(lastWorldTouchDown); camera.position.set(pos.x, pos.y, camera.position.z); camera.update(); return true; } @Override public boolean scrolled(int amount) { setZoom(camera.zoom * (1 + amount * 0.1f), Gdx.input.getX(), Gdx.input.getY()); return true; } /** * @param zoom the cameras zoom will be set to this value. * @param screenX the screen x-coordinate you want to zoom in on(or away from). * @param screenY the screen y-coordinate you want to zoom in on(or away from). */ public void setZoom(float zoom, int screenX, int screenY) { Vector2 touchWorldBefore = getPositionOfTouch(screenX, screenY); touchWorldBefore.add(camera.position.x, camera.position.y); camera.zoom = zoom; camera.update(); Vector2 touchWorldAfter = getPositionOfTouch(screenX, screenY); touchWorldAfter.add(camera.position.x, camera.position.y); camera.translate(touchWorldBefore.sub(touchWorldAfter)); camera.update(); } /** * @param screenX pixel. * @param screenY pixel. * @return position of touch in "world units", with center of screen as origin. */ public Vector2 getPositionOfTouch(int screenX, int screenY) { float halfWidth = Gdx.graphics.getWidth() * 0.5f; float halfHeight = Gdx.graphics.getHeight() * 0.5f; Vector2 pos = new Vector2(screenX - halfWidth, halfHeight - screenY); pos.scl(1f / halfWidth, 1f / halfHeight); pos.scl(camera.zoom); // convert to world units relative to center of screen pos.scl(camera.viewportWidth * 0.5f, camera.viewportHeight * 0.5f); return pos; } @Override public boolean mouseMoved(int screenX, int screenY) { return false; } }