Add RayCastUtil and unit tests
This commit is contained in:
James Seibel
@@ -0,0 +1,182 @@
|
||||
/*
|
||||
* This file is part of the Distant Horizons mod (formerly the LOD Mod),
|
||||
* licensed under the GNU LGPL v3 License.
|
||||
*
|
||||
* Copyright (C) 2020-2022 James Seibel
|
||||
*
|
||||
* This program is free software: you can redistribute it and/or modify
|
||||
* it under the terms of the GNU Lesser General Public License as published by
|
||||
* the Free Software Foundation, version 3.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU Lesser General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU Lesser General Public License
|
||||
* along with this program. If not, see <https://www.gnu.org/licenses/>.
|
||||
*/
|
||||
|
||||
package tests;
|
||||
|
||||
import com.seibel.lod.core.api.external.methods.data.DhApiTerrainDataRepo;
|
||||
import com.seibel.lod.core.util.RayCastUtil;
|
||||
import org.junit.Assert;
|
||||
import org.junit.Test;
|
||||
|
||||
/**
|
||||
* @author James Seibel
|
||||
* @version 2022-11-19
|
||||
*/
|
||||
public class RaycastingTest
|
||||
{
|
||||
|
||||
@Test
|
||||
public void DemoTest()
|
||||
{
|
||||
Assert.assertTrue("Example test 1", true);
|
||||
|
||||
double rayX, rayY;
|
||||
double xDir, yDir;
|
||||
|
||||
// 1x1 square at (1,1) - (2,2)
|
||||
double squareMinX = 1;
|
||||
double squareMinY = 1;
|
||||
int squareWidth = 1;
|
||||
|
||||
|
||||
|
||||
//============//
|
||||
// horizontal //
|
||||
//============//
|
||||
|
||||
// ray points right - direction <1,0>
|
||||
xDir = 1;
|
||||
yDir = 0;
|
||||
|
||||
// ray origin left of square
|
||||
rayX = 0;
|
||||
testRay(false, rayX, 0, xDir, yDir, squareMinX, squareMinY, squareWidth);
|
||||
testRay(false, rayX, 0.5, xDir, yDir, squareMinX, squareMinY, squareWidth);
|
||||
|
||||
testRay(true, rayX, 1, xDir, yDir, squareMinX, squareMinY, squareWidth);
|
||||
testRay(true, rayX, 1.5, xDir, yDir, squareMinX, squareMinY, squareWidth);
|
||||
testRay(true, rayX, 2, xDir, yDir, squareMinX, squareMinY, squareWidth);
|
||||
|
||||
testRay(false, rayX, 2.5, xDir, yDir, squareMinX, squareMinY, squareWidth);
|
||||
testRay(false, rayX, 3, xDir, yDir, squareMinX, squareMinY, squareWidth);
|
||||
|
||||
// ray origin right of square
|
||||
rayX = 2.5;
|
||||
testRay(false, rayX, 1, xDir, yDir, squareMinX, squareMinY, squareWidth);
|
||||
testRay(false, rayX, 1.5, xDir, yDir, squareMinX, squareMinY, squareWidth);
|
||||
testRay(false, rayX, 2, xDir, yDir, squareMinX, squareMinY, squareWidth);
|
||||
|
||||
|
||||
|
||||
//==========//
|
||||
// vertical //
|
||||
//==========//
|
||||
|
||||
xDir = 0;
|
||||
yDir = 1;
|
||||
|
||||
// ray points up - direction <0,1>
|
||||
rayY = 0;
|
||||
|
||||
// ray origin below square
|
||||
testRay(false, 0, rayY, xDir, yDir, squareMinX, squareMinY, squareWidth);
|
||||
testRay(false, 0.5, rayY, xDir, yDir, squareMinX, squareMinY, squareWidth);
|
||||
|
||||
testRay(true, 1, rayY, xDir, yDir, squareMinX, squareMinY, squareWidth);
|
||||
testRay(true, 1.5, rayY, xDir, yDir, squareMinX, squareMinY, squareWidth);
|
||||
testRay(true, 2, rayY, xDir, yDir, squareMinX, squareMinY, squareWidth);
|
||||
|
||||
testRay(false, 2.5, rayY, xDir, yDir, squareMinX, squareMinY, squareWidth);
|
||||
testRay(false, 3, rayY, xDir, yDir, squareMinX, squareMinY, squareWidth);
|
||||
|
||||
|
||||
// ray origin in square
|
||||
testRay(true, 1, 1, xDir, yDir, squareMinX, squareMinY, squareWidth);
|
||||
testRay(true, 1.5, 1.5, xDir, yDir, squareMinX, squareMinY, squareWidth);
|
||||
testRay(true, 2, 2, xDir, yDir, squareMinX, squareMinY, squareWidth);
|
||||
|
||||
|
||||
// ray origin above square
|
||||
rayY = 2.5;
|
||||
testRay(false, 1, rayY, xDir, yDir, squareMinX, squareMinY, squareWidth);
|
||||
testRay(false, 1.5, rayY, xDir, yDir, squareMinX, squareMinY, squareWidth);
|
||||
testRay(false, 2, rayY, xDir, yDir, squareMinX, squareMinY, squareWidth);
|
||||
|
||||
|
||||
|
||||
//=======//
|
||||
// point //
|
||||
//=======//
|
||||
|
||||
// AKA the slope is perpendicular to this plane
|
||||
// direction <0,0>
|
||||
xDir = 0;
|
||||
yDir = 0;
|
||||
testRay(false, 0, 0, xDir, yDir, squareMinX, squareMinY, squareWidth);
|
||||
testRay(false, 0.5, 0.5, xDir, yDir, squareMinX, squareMinY, squareWidth);
|
||||
|
||||
testRay(true, 1, 1, xDir, yDir, squareMinX, squareMinY, squareWidth);
|
||||
testRay(true, 1.5, 1.5, xDir, yDir, squareMinX, squareMinY, squareWidth);
|
||||
testRay(true, 2, 2, xDir, yDir, squareMinX, squareMinY, squareWidth);
|
||||
|
||||
testRay(false, 2.5, 2.5, xDir, yDir, squareMinX, squareMinY, squareWidth);
|
||||
testRay(false, 3, 3, xDir, yDir, squareMinX, squareMinY, squareWidth);
|
||||
|
||||
|
||||
|
||||
//==========//
|
||||
// diagonal //
|
||||
//==========//
|
||||
|
||||
// ray points up right - direction <4,3> (a slope of 3/4)
|
||||
xDir = 4;
|
||||
yDir = 3;
|
||||
|
||||
// ray origin bottom left of square
|
||||
rayX = 0;
|
||||
testRay(false, rayX, -1, xDir, yDir, squareMinX, squareMinY, squareWidth);
|
||||
|
||||
testRay(true, rayX, -0.5, xDir, yDir, squareMinX, squareMinY, squareWidth);
|
||||
testRay(true, rayX, 0, xDir, yDir, squareMinX, squareMinY, squareWidth);
|
||||
testRay(true, rayX, 0.5, xDir, yDir, squareMinX, squareMinY, squareWidth);
|
||||
testRay(true, rayX, 1, xDir, yDir, squareMinX, squareMinY, squareWidth);
|
||||
|
||||
testRay(false, rayX, 1.5, xDir, yDir, squareMinX, squareMinY, squareWidth);
|
||||
testRay(false, rayX, 2, xDir, yDir, squareMinX, squareMinY, squareWidth);
|
||||
|
||||
|
||||
// ray origin in square
|
||||
testRay(true, 1, 1, xDir, yDir, squareMinX, squareMinY, squareWidth);
|
||||
testRay(true, 1.5, 1.5, xDir, yDir, squareMinX, squareMinY, squareWidth);
|
||||
testRay(true, 2, 2, xDir, yDir, squareMinX, squareMinY, squareWidth);
|
||||
|
||||
|
||||
// ray origin right of square
|
||||
rayX = 2.5;
|
||||
rayY = (yDir/xDir) * rayX; // y = mx + b // b is the constants defined below
|
||||
testRay(false, rayX, -0.5 + rayY, xDir, yDir, squareMinX, squareMinY, squareWidth);
|
||||
testRay(false, rayX, 0 + rayY, xDir, yDir, squareMinX, squareMinY, squareWidth);
|
||||
testRay(false, rayX, 0.5 + rayY, xDir, yDir, squareMinX, squareMinY, squareWidth);
|
||||
testRay(false, rayX, 1 + rayY, xDir, yDir, squareMinX, squareMinY, squareWidth);
|
||||
|
||||
}
|
||||
|
||||
private static void testRay(boolean expectedToIntersect, double rayX, double rayY, double xDir, double yDir, double squareMinX, double squareMinY, double squareWidth)
|
||||
{
|
||||
boolean intersects = RayCastUtil.rayIntersectsSquare(rayX, rayY, xDir, yDir, squareMinX, squareMinY, squareWidth);
|
||||
Assert.assertEquals(failMessage(rayX, rayY, xDir, yDir, squareMinX, squareMinY, squareWidth), expectedToIntersect, intersects);
|
||||
}
|
||||
|
||||
private static String failMessage(double rayX, double rayY, double xDir, double yDir, double squareMinX, double squareMinY, double squareWidth)
|
||||
{
|
||||
return "ray: [" + rayX + ", " + rayY + "] <" + xDir + ", " + yDir + "> square: [" + squareMinX + ", " + squareMinY + "] - [" + (squareMinX+squareWidth) + ", " + (squareMinY+squareWidth) + "]";
|
||||
}
|
||||
|
||||
|
||||
}
|
||||
Reference in New Issue
Block a user