public Cube getCube(int x, int y, int z) {
// returns a cube if x,y,z lie within it
Cube returnCube = null;
for (Cube cube : cubes) {
if (cube.collisionLooking(-x, -y, -z)) {
returnCube = cube;
break;
}
}
return returnCube;
}
public boolean collisionLooking(float x, float y, float z) {
// collision for selecting a cube being looked at
boolean collision = false;
for (Cube cube : cubes) {
if (cube.collisionLooking(-x, -y, -z)) {
collision = true;
break;
}
}
return collision;
}
public boolean collisionJump(float x, float y, float z) {
boolean collision = false;
for (Cube cube : cubes) {
if (cube.collision(-x, -y, -z, controller.playerHeight, controller.playerBox)) {
collision = true;
controller.jumping = false;
break;
}
}
return collision;
}
public boolean collision(float x, float y, float z) {
// collision detection for a player walking into a cube
boolean collision = false;
for (Cube cube : cubes) {
// a slightly larger bounding box is given to the player
// this makes it seem like the player is 3D
if (cube.collision(-x, -y, -z, controller.playerHeight, controller.playerBox)) {
collision = true;
break;
}
}
return collision;
}
public void checkSelected() {
// this method highlights a cube if it is being looked at
// I use a method of ray tracing to check along the players line of sight
if (controller.getSelectedWeapon() != 1) return;
boolean anythingSelected = false;
int maxIterations = 500;
float newX = 0, newY = 0, newZ = 0;
for (int i = 0; i < maxIterations; i += 1) {
newX =
-(controller.getX()
+ (float)
(-(i)
* (Math.sin(Math.toRadians(controller.getAngleX())))
* (Math.cos(Math.toRadians(controller.getAngleY())))));
newY =
-(controller.getY()
+ (float) (-(i) * (Math.sin(Math.toRadians(controller.getAngleY())))));
newZ =
-(controller.getZ()
+ (float)
((i)
* (Math.cos(Math.toRadians(controller.getAngleX())))
* (Math.cos(Math.toRadians(controller.getAngleY())))));
if (collisionLooking(-newX, -newY, -newZ)) {
Cube selected = getCube(-(int) newX, -(int) newY, -(int) newZ);
int[][] sides = new int[6][3];
float[] differences = new float[6];
for (int j = 0; j < sides.length; j++) {
sides[j] = selected.getSideMid(j);
}
for (int j = 0; j < sides.length; j++) {
differences[j] =
(float)
Math.sqrt(
Math.pow((sides[j][0] - newX), 2)
+ Math.pow((sides[j][1] - newY), 2)
+ Math.pow((sides[j][2] - newZ), 2));
}
float smallest = differences[0];
for (int j = 0; j < differences.length; j++) {
if (differences[j] < smallest) smallest = differences[j];
}
int side = -1;
for (int j = 0; j < differences.length; j++) {
if (differences[j] == smallest) side = j;
}
selected.selectedSide[side] = true;
selectedCube = selected;
selectedSide = side;
anythingSelected = true;
break;
}
}
if (!anythingSelected) {
selectedCube = null;
selectedSide = -1;
}
}
public boolean collision(float x, float y, float z, Cube cube) {
// collision detection for a given cube
return cube.collision(-x, -y, -z, controller.playerHeight, controller.playerBox);
}
public void renderCubes() {
for (Cube cube : cubes) {
cube.render();
cube.renderDecals();
}
}