Mega Code Archive
Methods for converting between the physics world coordinates and the screen coordinates
<![CDATA[
/*
* Copyright (C) 2010 Adam Nyb?ck
*
* 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 se.anyro.breakin;
import android.graphics.Point;
/**
* Methods for converting between the physics world coordinates and the screen coordinates.
* Note! setScreenSize has to be called before the other methods are used.
*/
class SizeUtil {
private static int screenWidth = 320;
private static int screenHeight = 480;
private static int halfWidth = screenWidth / 2;
private static int halfHeight = screenHeight / 2;
private static float scale = 16;
public static void setScreenSize(int width, int height) {
screenWidth = width;
screenHeight = height;
halfWidth = width / 2;
halfHeight = height / 2;
// Scale to maximum height/width depending on the ratio
if (width * 3 > height * 2) {
scale = (float) height / 200;
} else {
scale = (float) width / 200;
}
}
public static int getScreenWidth() {
return screenWidth;
}
public static int getScreenHeight() {
return screenHeight;
}
public static void toScreen(float worldX, float worldY, Point screen) {
screen.x = halfWidth + (int) (worldX * scale);
screen.y = halfHeight - (int) (worldY * scale);
}
public static int toScreen(float worldLen) {
return (int) (worldLen * scale);
}
public static float fromScreen(int screenLen) {
return screenLen / scale;
}
}
]]>