Java tutorial
#set($symbol_pound='#')#set($symbol_dollar='$')#set($symbol_escape='\') /* The MIT License (MIT) Copyright (c) 2013 devnewton <devnewton@bci.im> 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 ${package}.${rootArtifactId}.game.systems; import com.artemis.Aspect; import com.artemis.ComponentMapper; import com.artemis.Entity; import com.artemis.EntitySystem; import com.artemis.annotations.Mapper; import com.artemis.utils.ImmutableBag; import im.bci.jnuit.lwjgl.LwjglHelper; import im.bci.jnuit.lwjgl.LwjglNuitFont; import im.bci.jnuit.animation.IAnimationFrame; import im.bci.jnuit.animation.IAnimationImage; import im.bci.jnuit.animation.IPlay; import im.bci.jnuit.artemis.sprite.SpriteProjector; import im.bci.jnuit.NuitToolkit; import java.util.ArrayList; import java.util.Collections; import java.util.Comparator; import java.util.List; import com.google.inject.Inject; import ${package}.${rootArtifactId}.game.Game; import im.bci.jnuit.lwjgl.assets.IAssets; import im.bci.jnuit.artemis.sprite.Sprite; import ${package}.${rootArtifactId}.game.components.Level; import ${package}.${rootArtifactId}.game.components.ui.MainMenu; import ${package}.${rootArtifactId}.game.components.ZOrder; import ${package}.${rootArtifactId}.game.components.ui.DialogueComponent; import ${package}.${rootArtifactId}.game.utils.Viewport; import org.lwjgl.input.Mouse; import org.lwjgl.opengl.GL11; import org.lwjgl.util.glu.GLU; import pythagoras.f.Vector; import pythagoras.f.Vector3; /** * * @author devnewton */ public class DrawSystem extends EntitySystem { @Mapper ComponentMapper<ZOrder> zOrderMapper; @Mapper ComponentMapper<Sprite> spriteMapper; @Mapper ComponentMapper<MainMenu> mainMenuMapper; @Mapper ComponentMapper<DialogueComponent> dialogMapper; @Mapper ComponentMapper<Level> levelMapper; private final Comparator<Entity> zComparator=new Comparator<Entity>(){@Override public int compare(Entity o1,Entity o2){int result=Integer.compare(zOrderMapper.get(o1).getZ(),zOrderMapper.get(o2).getZ());if(result==0){Sprite s1=spriteMapper.get(o1);Sprite s2=spriteMapper.get(o2);result=Integer.compare(null!=s1?1:0,null!=s2?1:0);if(result==0&&null!=s1&&null!=s2){result=spriteProjector.compare(s1.getPosition(),s2.getPosition());}}return result;}}; private SpriteProjector spriteProjector; private final IAssets assets; private final Viewport viewPort = new Viewport(); private final NuitToolkit toolkit; @Inject public DrawSystem(IAssets assets, NuitToolkit toolkit) { super(Aspect.getAspectForAll(ZOrder.class).one(Level.class, MainMenu.class, DialogueComponent.class, Sprite.class)); this.assets = assets; this.toolkit = toolkit; } @Override protected void processEntities(ImmutableBag<Entity> entities) { GL11.glClearColor(0.1f, 0, 0, 1f); GL11.glClear(GL11.GL_COLOR_BUFFER_BIT); List<Entity> entititesSortedByZ = new ArrayList<>(entities.size()); for (int i = 0, n = entities.size(); i < n; ++i) { final Entity e = entities.get(i); if (e.isEnabled()) { entititesSortedByZ.add(e); } } Collections.sort(entititesSortedByZ, zComparator); GL11.glPushAttrib(GL11.GL_ENABLE_BIT | GL11.GL_TRANSFORM_BIT | GL11.GL_HINT_BIT | GL11.GL_COLOR_BUFFER_BIT | GL11.GL_SCISSOR_BIT | GL11.GL_LINE_BIT | GL11.GL_TEXTURE_BIT); GL11.glMatrixMode(GL11.GL_PROJECTION); GL11.glPushMatrix(); GL11.glLoadIdentity(); updateViewPort(); GL11.glViewport(viewPort.x, viewPort.y, viewPort.width, viewPort.height); GLU.gluOrtho2D(-toolkit.getVirtualResolutionWidth() / 2.0f, toolkit.getVirtualResolutionWidth() / 2.0f, toolkit.getVirtualResolutionHeight() / 2.0f, -toolkit.getVirtualResolutionHeight() / 2.0f); GL11.glMatrixMode(GL11.GL_MODELVIEW); GL11.glPushMatrix(); GL11.glLoadIdentity(); GL11.glEnable(GL11.GL_TEXTURE_2D); GL11.glEnable(GL11.GL_BLEND); GL11.glEnable(GL11.GL_LINE_SMOOTH); GL11.glDisable(GL11.GL_DEPTH_TEST); GL11.glDisable(GL11.GL_LIGHTING); GL11.glDisable(GL11.GL_SCISSOR_TEST); GL11.glBlendFunc(GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA); GL11.glHint(GL11.GL_LINE_SMOOTH_HINT, GL11.GL_NICEST); Game game = (Game) world; Entity hero = game.getHero(); if (null != hero) { Sprite heroSprite = spriteMapper.get(hero); Vector heroPos = spriteProjector.project(heroSprite.getPosition()); GL11.glTranslatef(-heroPos.x, -heroPos.y, 0.0f); } for (Entity e : entititesSortedByZ) { MainMenu mainMenu = mainMenuMapper.getSafe(e); if (null != mainMenu) { mainMenu.draw(); } DialogueComponent dialog = dialogMapper.getSafe(e); if (null != dialog) { dialog.draw(); } Level level = levelMapper.getSafe(e); if (null != level) { drawLevel(level); } Sprite sprite = spriteMapper.getSafe(e); if (null != sprite) { drawSprite(sprite); } } GL11.glPopMatrix(); GL11.glMatrixMode(GL11.GL_PROJECTION); GL11.glPopMatrix(); GL11.glPopAttrib(); } @Override protected boolean checkProcessing() { return true; } private void drawLevel(Level level) { GL11.glPushMatrix(); GL11.glLoadIdentity(); IPlay backgroundAnimationPlay = level.getBackground(); backgroundAnimationPlay.update((long) (world.getDelta() * 1000L)); final IAnimationFrame currentFrame = backgroundAnimationPlay.getCurrentFrame(); GL11.glBindTexture(GL11.GL_TEXTURE_2D, (Integer) currentFrame.getImage().getId()); float x1 = -toolkit.getVirtualResolutionWidth() / 2.0f; float x2 = toolkit.getVirtualResolutionWidth() / 2.0f; float y1 = toolkit.getVirtualResolutionHeight() / 2.0f; float y2 = -toolkit.getVirtualResolutionHeight() / 2.0f; float u1 = currentFrame.getU1(); float u2 = currentFrame.getU2(); float v1 = currentFrame.getV2(); float v2 = currentFrame.getV1(); GL11.glBegin(GL11.GL_QUADS); GL11.glTexCoord2f(u1, v1); GL11.glVertex2f(x1, y2); GL11.glTexCoord2f(u2, v1); GL11.glVertex2f(x2, y2); GL11.glTexCoord2f(u2, v2); GL11.glVertex2f(x2, y1); GL11.glTexCoord2f(u1, v2); GL11.glVertex2f(x1, y1); GL11.glEnd(); GL11.glPopMatrix(); } private void drawSprite(Sprite sprite) { Vector pos = spriteProjector.project(sprite.getPosition()); final IPlay play = sprite.getPlay(); if (null != play) { GL11.glPushMatrix(); GL11.glTranslatef(pos.x, pos.y, 0.0f); GL11.glRotatef(sprite.getRotate(), 0, 0, 1.0f); GL11.glScalef(sprite.getScale(), sprite.getScale(), 1); final IAnimationFrame frame = play.getCurrentFrame(); final IAnimationImage image = frame.getImage(); if (image.hasAlpha()) { GL11.glEnable(GL11.GL_BLEND); } GL11.glBindTexture(GL11.GL_TEXTURE_2D, (Integer) image.getId()); final float u1, u2; if (sprite.isMirrorX()) { u1 = frame.getU2(); u2 = frame.getU1(); } else { u1 = frame.getU1(); u2 = frame.getU2(); } final float v1, v2; if (sprite.isMirrorY()) { v1 = frame.getV1(); v2 = frame.getV2(); } else { v1 = frame.getV2(); v2 = frame.getV1(); } GL11.glColor4f(sprite.getRed(), sprite.getGreen(), sprite.getBlue(), sprite.getAlpha()); float x1 = -sprite.getWidth() / 2.0f; float x2 = sprite.getWidth() / 2.0f; float y1 = -sprite.getHeight() / 2.0f; float y2 = sprite.getHeight() / 2.0f; GL11.glBegin(GL11.GL_QUADS); GL11.glTexCoord2f(u1, v1); GL11.glVertex2f(x1, y2); GL11.glTexCoord2f(u2, v1); GL11.glVertex2f(x2, y2); GL11.glTexCoord2f(u2, v2); GL11.glVertex2f(x2, y1); GL11.glTexCoord2f(u1, v2); GL11.glVertex2f(x1, y1); GL11.glEnd(); GL11.glColor3f(1f, 1f, 1f); if (image.hasAlpha()) { GL11.glDisable(GL11.GL_BLEND); } GL11.glPopMatrix(); } if (null != sprite.getLabel()) { GL11.glPushMatrix(); GL11.glTranslatef(pos.x, pos.y, 0.0f); GL11.glScalef(0.5f, -0.5f, 1f); GL11.glEnable(GL11.GL_BLEND); LwjglNuitFont font = (LwjglNuitFont) assets.getFont(""); font.drawString(sprite.getLabel(), LwjglNuitFont.Align.CENTER); GL11.glDisable(GL11.GL_BLEND); GL11.glPopMatrix(); } } public void setSpriteProjector(SpriteProjector spriteProjector) { this.spriteProjector = spriteProjector; } public SpriteProjector getSpriteProjector() { return spriteProjector; } public Vector3 getMouseSpritePos(int yAdjust) { if (null != spriteProjector) { float mouseX = (Mouse.getX() - viewPort.x) * toolkit.getVirtualResolutionWidth() / viewPort.width - toolkit.getVirtualResolutionWidth() / 2.0f; float mouseY = toolkit.getVirtualResolutionHeight() - ((Mouse.getY() + yAdjust - viewPort.y) * toolkit.getVirtualResolutionHeight() / viewPort.height) - toolkit.getVirtualResolutionHeight() / 2.0f; Entity ned = ((Game) world).getHero(); if (null != ned) { Sprite nedSprite = spriteMapper.get(ned); Vector nedPos = spriteProjector.project(nedSprite.getPosition()); mouseX += nedPos.x; mouseY += nedPos.y; } return spriteProjector.unProject(new Vector(mouseX, mouseY)); } else { return null; } } private void updateViewPort() { final float aspect = (float) toolkit.getVirtualResolutionWidth() / (float) toolkit.getVirtualResolutionHeight(); int screenWidth = LwjglHelper.getWidth(); int screenHeight = LwjglHelper.getHeight(); viewPort.width = screenWidth; viewPort.height = (int) (screenWidth / aspect); if (viewPort.height > screenHeight) { viewPort.height = screenHeight; viewPort.width = (int) (screenHeight * aspect); } viewPort.x = (screenWidth - viewPort.width) / 2; viewPort.y = (screenHeight - viewPort.height) / 2; } }