package uk.org.floop.epq3d;
import java.awt.*;
import java.awt.event.KeyEvent;
import java.awt.image.BufferedImage;
import java.awt.image.ImageObserver;
public class Player {
public Plane[] frustumPlanes = new Plane[6];
// image that represents the player's position on the board
// current position of the player on the board grid
private Matrix rotMatrix;
public Matrix camMatrix;
private Matrix invRotMatrix;
private Matrix invCamMatrix;
public double FOV = 100;
protected double Fpdis;
protected Point3D FPWorldPos;
protected PointComp[] ScreenCornerPosS = new PointComp[4];
private final Point3D position = new Point3D(0,0,0);
private final Point3D rotation = new Point3D(0,Math.PI / 2, 0);
private final Vector3D direction = new Vector3D(0,0,0);
public Vector3D viewVector = new Vector3D(0,0,0);
public double mouseSensitivity = 0.005; // radians per pixel
// called when the player is initialised
public Player(int scrX, int scrY) {
Fpdis = 1/Math.tan(Math.toRadians(FOV)/2d);
for(int i = 0; i < 6; i+=1){
frustumPlanes[i] = new Plane();
}
double yVal = (double)scrY / (double)scrX;
// flip x and y because reasons
ScreenCornerPosS[0] = new PointComp(-yVal,-1, 0);
ScreenCornerPosS[1] = new PointComp(yVal,-1, 0);
ScreenCornerPosS[2] = new PointComp(-yVal,1, 0);
ScreenCornerPosS[3] = new PointComp(yVal,1, 0);
}
// unused because the player should not be drawn
// I'm leaving it in as a hint to buffered Images
public void draw(Graphics g, ImageObserver observer) {
int width = 100;
int height = 100;
BufferedImage img = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB );
for ( int py = 0; py < height; py++ ) {
for ( int px = 0; px < width; px++ ) {
// Set the pixel colour of the image n.b. x = cc, y = rc
img.setRGB(px, py, Color.BLACK.getRGB() );
}
}
g.drawImage(img, 0, 0, observer);
}
public void keyPressed(int key) {
if (key == KeyEvent.VK_W && direction.x < 1) {
direction.x += 1;
} else if (key == KeyEvent.VK_S && -direction.x < 1) {
direction.x += -1;
} else if (key == KeyEvent.VK_A && direction.y < 1) {
direction.y += 1;
} else if (key == KeyEvent.VK_D && -direction.y < 1) {
direction.y += -1;
} else if (key == KeyEvent.VK_SPACE && direction.z < 1) {
direction.z += 1;
} else if (key == KeyEvent.VK_SHIFT && -direction.z < 1) {
direction.z += -1;
}
}
public void keyReleased(int key){
if (key == KeyEvent.VK_W && direction.x > -1) {
direction.x -= 1;
} else if (key == KeyEvent.VK_S && -direction.x > -1) {
direction.x -= -1;
} else if (key == KeyEvent.VK_A && direction.y > -1) {
direction.y -= 1;
} else if (key == KeyEvent.VK_D && -direction.y > -1) {
direction.y -= -1;
} else if (key == KeyEvent.VK_SPACE && direction.z > -1) {
direction.z -= 1;
} else if (key == KeyEvent.VK_SHIFT && -direction.z > -1) {
direction.z -= -1;
}
}
public void tick(Point2D mouseRel) {
// gets called once every tick, before the repainting process happens.
// change rotation depending on mouse movement
rotation.z -= mouseRel.x * mouseSensitivity;
// force z rotation to wrap around
if(rotation.z<-Math.PI){
rotation.z = Math.PI;
} else if(rotation.z>Math.PI){
rotation.z = -Math.PI;
}
rotation.y += mouseRel.y * mouseSensitivity;
// max out y rotation at 0 and -90 degrees
if(rotation.y < 0){
rotation.y = 0;
} else if(rotation.y > Math.PI){
rotation.y = Math.PI;
}
// define rotation and translation matrices
Matrix zMat = new Matrix(3, 3);
zMat.setItems(new double[][]{
{Math.cos(rotation.z), Math.sin(rotation.z), 0},
{-Math.sin(rotation.z), Math.cos(rotation.z), 0},
{0, 0, 1}}
);
Matrix yMat = new Matrix(3, 3);
yMat.setItems(new double[][]{
{Math.cos(rotation.y), 0, -Math.sin(rotation.y)},
{0, 1, 0 },
{Math.sin(rotation.y), 0, Math.cos(rotation.y) }}
);
Matrix xMat = new Matrix(3, 3);
xMat.setItems(new double[][]{
{1, 0, 0 },
{0, Math.cos(rotation.x), Math.sin(rotation.x)},
{0, -Math.sin(rotation.x), Math.cos(rotation.x)}}
);
// calculate inverse matrices
Matrix izMat = new Matrix(3, 3);
izMat.setItems(new double[][]{
{Math.cos(-rotation.z), Math.sin(-rotation.z), 0},
{-Math.sin(-rotation.z), Math.cos(-rotation.z), 0},
{0, 0, 1}}
);
Matrix iyMat = new Matrix(3, 3);
iyMat.setItems(new double[][]{
{Math.cos(-rotation.y), 0, -Math.sin(-rotation.y)},
{0, 1, 0 },
{Math.sin(-rotation.y), 0, Math.cos(-rotation.y) }}
);
Matrix ixMat = new Matrix(3, 3);
ixMat.setItems(new double[][]{
{1, 0, 0 },
{0, Math.cos(-rotation.x), Math.sin(-rotation.x)},
{0, -Math.sin(-rotation.x), Math.cos(-rotation.x)}}
);
// apply izMat to direction vector
try {
Vector3D dirvec = new Vector3D();
izMat.multiplyVec3to(direction, dirvec);
double dirLen = dirvec.getLength();
if (dirLen != 0) {
dirvec.x = dirvec.x / (dirLen * 40);
dirvec.y = dirvec.y / (dirLen * 40);
dirvec.z = dirvec.z / (dirLen * 40);
}
position.translate(dirvec);
} catch (Exception e) {
throw new RuntimeException(e);
}
Matrix traMat = new Matrix(4, 3);
traMat.setItems(new double[][]
{{1, 0, 0, -position.x},
{0, 1, 0, -position.y},
{0, 0, 1, -position.z}}
);
// multiply out matrices
rotMatrix = xMat.multiplyGetResult(yMat).multiplyGetResult(zMat);
camMatrix = rotMatrix.multiplyGetResult(traMat);
invRotMatrix = izMat.multiplyGetResult(iyMat).multiplyGetResult(ixMat);
// I really don't want to do it like this, but I don't think there's any other way without messing up
// all my other matrices :(
invCamMatrix = new Matrix(4, 3);
for(int x = 0; x<3; x+=1){
for(int y = 0; y<3; y+=1){
invCamMatrix.setItem(x, y, invRotMatrix.getItem(x, y));
}}
for(int y = 0; y<3; y+=1){
invCamMatrix.setItem(3, y, -traMat.getItem(3, y));
}
// calculate view vector
Point3D viewPoint = new Point3D(0,0,0);
invRotMatrix.multiplyPoint3to(new Point3D(0,0,1), viewPoint);
viewVector.x = viewPoint.x;viewVector.y=viewPoint.y;viewVector.z=viewPoint.z;
// calculate camera focal point and edges in world coordinates
FPWorldPos = new Point3D(
position.x - viewVector.x*Fpdis,
position.y - viewVector.y*Fpdis,
position.z - viewVector.z*Fpdis);
for (PointComp point:
ScreenCornerPosS) {
point.invalidate();
point.setRotatedPoint(invCamMatrix);
}
// find frustum planes
// near plane
frustumPlanes[0].initFrom3Points(ScreenCornerPosS[0].getRotatedPoint(),
ScreenCornerPosS[1].getRotatedPoint(), ScreenCornerPosS[2].getRotatedPoint());
// far plane
int farPlaneDis = 1000;
frustumPlanes[1].initFromPointAndVector(
new Point3D(
position.x + viewVector.x*farPlaneDis,
position.y + viewVector.y*farPlaneDis,
position.z + viewVector.z*farPlaneDis),
// invert the view vector because the normal needs to point the other way
new Vector3D(-viewVector.x, -viewVector.y, -viewVector.z));
// mid planes
// left plane
frustumPlanes[2].initFrom3Points(FPWorldPos,
ScreenCornerPosS[0].getRotatedPoint(), ScreenCornerPosS[1].getRotatedPoint());
// right plane
frustumPlanes[3].initFrom3Points(FPWorldPos,
ScreenCornerPosS[3].getRotatedPoint(), ScreenCornerPosS[2].getRotatedPoint());
// top plane
frustumPlanes[4].initFrom3Points(FPWorldPos,
ScreenCornerPosS[1].getRotatedPoint(), ScreenCornerPosS[3].getRotatedPoint());
// bottom plane
frustumPlanes[5].initFrom3Points(FPWorldPos,
ScreenCornerPosS[2].getRotatedPoint(), ScreenCornerPosS[0].getRotatedPoint());
}
// returnValue Functions
public Point3D getPos() {
return position;
}
public Point3D getRot() {
return rotation;
}
}
