I am making a multiplayer racing game for a school project, that draws a 4 player splitscreen on the Camera Actors Class image. The world size is set by the world class and everything works fine with world sizes smaller than 1200x800px. If i want to use a bigger world though it starts running really slow.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 | import greenfoot.*; // (World, Actor, GreenfootImage, Greenfoot and MouseInfo)import org.jbox2d.common.*;import java.awt.image.*;import java.awt.*;import java.awt.geom.AffineTransform;public class Camera extends Actor{ //Verzögerung mit der Kamera Auto folgt: je kleiner, desto größer die Verzögerung private float lag = 0.07f; private Vec2[] camPos; private Vec2[] carPos; private Vec2[] carPosRaw; private float[] carRot; private MyWorld world; private boolean setup = false; private GreenfootImage track = new GreenfootImage("images/Download.png"); private GreenfootImage carImg = new GreenfootImage("images/car02.png"); private BufferedImage srcAwt; private Rectangle rect; private GreenfootImage gCrop; private BufferedImage bCrop; private int width = world.width; private int height = world.height; public Camera() { gCrop = new GreenfootImage(width, height); setImage(gCrop); camPos = new Vec2[4]; carPos = new Vec2[4]; carPosRaw = new Vec2[4]; carRot = new float[4]; for(int i = 0; i<4; i++) { camPos[i] = new Vec2(0,0); carPos[i] = new Vec2(0,0); carPosRaw[i] = new Vec2(0,0); carRot[i] = 0; } } public void setup() { world = (MyWorld)getWorld(); } public void act() { if(!setup) { setup(); setup = true; } } public void setCarTransform(Vec2 pos, float rot, int n) { carPos[n] = pos; carRot[n] = rot; } public void followLocation(int n) { Vec2 offset = new Vec2(0,0); if(setup) { camPos[n].x += (-carPos[n].x - camPos[n].x) * lag; camPos[n].y += (-carPos[n].y - camPos[n].y) * lag; carPos[n].x += camPos[n].x; carPos[n].y += camPos[n].y; splitScreen(); } carPosRaw[n] = new Vec2(carPos[n].x-camPos[n].x, carPos[n].y-camPos[n].y); } public void splitScreen() { splitCar(track, 0,0); splitCar(track, 1,1); splitCar(track, 2,2); splitCar(track, 3,3); Vec2 offsetCam = new Vec2(0,0); // i: Screen, u: Auto for(int i= 0; i<4; i++) { switch(i) { case 0: offsetCam = new Vec2(width/4, height/4); break; case 1: offsetCam = new Vec2(3*width/4, height/4); break; case 2: offsetCam = new Vec2(width/4, 3*height/4); break; case 3: offsetCam = new Vec2(3*width/4, 3*height/4); break; } for(int u = 0; u<4; u++) { splitCopy(carImg, i, new Vec2(carPosRaw[u].x+camPos[i].x+offsetCam.x,carPosRaw[u].y+camPos[i].y+offsetCam.y), carRot[u]); } } } public void splitCopy(GreenfootImage src, int n, Vec2 pos, float rot) { Vec2 posInCam = new Vec2(pos.x-38.5f, pos.y-18f); float x = posInCam.x; float y = posInCam.y; splitscreen(src,n,x,y,-rot); } public void splitCar(GreenfootImage src, int n, int s) { float x = camPos[s].x; float y = camPos[s].y; AffineTransform at = new AffineTransform(); switch(n) { case 0: at.translate(x,y); break; case 1: x += width/2; break; case 2: y+= height/2; break; case 3: x+= width/2; y+= height/4; break; } splitscreen(src, n, x,y, 0); } public void splitscreen(GreenfootImage src, int n, float x, float y, float rot) { srcAwt = src.getAwtImage(); Graphics2D g2d = gCrop.getAwtImage().createGraphics(); switch(n) { case 0: rect = new Rectangle(0,0,width/2,height/2); break; case 1: rect = new Rectangle(width/2,0,width,height/2); break; case 2: rect = new Rectangle(0,height/2,width/2,height); break; case 3: rect = new Rectangle(width/2,height/2,width,height); break; } g2d.clip(rect); AffineTransform tx = AffineTransform.getRotateInstance(rot, x+srcAwt.getWidth()/2, y+srcAwt.getHeight()/2); tx.translate(x,y); // g2d.drawImage(srcAwt,x, y,null); g2d.drawImage(srcAwt,tx,null); g2d.setClip(null); g2d.dispose(); }} |
