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package com.mbien.opencl.demos.julia3d;
import com.mbien.opencl.demos.julia3d.structs.RenderingConfig;
import com.mbien.opencl.demos.julia3d.structs.Vec;
import java.awt.Component;
import java.awt.Point;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseWheelEvent;
import static java.lang.Math.*;
import static com.mbien.opencl.demos.julia3d.Renderer.*;
/**
* Utility class for interacting with a scene. Supports rotation and zoom around origin.
* @author Michael Bien
*/
public class UserSceneController {
private Point dragstart;
private RenderingConfig model;
private Renderer view;
private enum MOUSE_MODE { DRAG_ROTATE, DRAG_ZOOM }
private MOUSE_MODE dragmode = MOUSE_MODE.DRAG_ROTATE;
public void init(Renderer view, Component component, RenderingConfig model) {
initMouseListeners(component);
this.view = view;
this.model = model;
}
private void initMouseListeners(Component component) {
MouseAdapter mouseAdapter = new MouseAdapter() {
@Override
public void mouseDragged(MouseEvent e) {
int x = e.getX();
int y = e.getY();
switch (dragmode) {
case DRAG_ROTATE:
if (dragstart != null) {
int height = model.getHeight();
int width = model.getWidth();
int ry = height - y - 1;
int baseMu1 = width - MU_RECT_SIZE - 2;
int baseMu2 = 1;
int baseMu3 = width - MU_RECT_SIZE - 2;
int baseMu4 = MU_RECT_SIZE + 2;
if ((x >= baseMu1 && x <= baseMu1 + MU_RECT_SIZE) && (ry >= baseMu2 && ry <= baseMu2 + MU_RECT_SIZE)) {
float[] mu = model.getMu();
mu[0] = 3.f * ( x - baseMu1) / (float)MU_RECT_SIZE - 1.5f;
mu[1] = 3.f * (ry - baseMu2) / (float)MU_RECT_SIZE - 1.5f;
model.setMu(mu);
} else if ((x >= baseMu3 && x <= baseMu3 + MU_RECT_SIZE) && (ry >= baseMu4 && ry <= baseMu4 + MU_RECT_SIZE)) {
float[] mu = model.getMu();
mu[2] = 3.f * ( x - baseMu3) / (float)MU_RECT_SIZE - 1.5f;
mu[3] = 3.f * (ry - baseMu4) / (float)MU_RECT_SIZE - 1.5f;
model.setMu(mu);
} else {
rotateCameraYbyOrig(0.01f * (x - dragstart.getX()));
rotateCameraXbyOrig(0.01f * (y - dragstart.getY()));
}
}
dragstart = e.getPoint();
view.update();
break;
case DRAG_ZOOM:
if (dragstart != null) {
float zoom = (float) ((y - dragstart.getY()) / 10.0f);
zoom(zoom);
}
dragstart = e.getPoint();
view.update();
break;
}
}
@Override
public void mousePressed(MouseEvent e) {
switch (e.getButton()) {
case (MouseEvent.BUTTON1):
dragmode = MOUSE_MODE.DRAG_ROTATE;
break;
case (MouseEvent.BUTTON2):
dragmode = MOUSE_MODE.DRAG_ZOOM;
break;
case (MouseEvent.BUTTON3):
dragmode = MOUSE_MODE.DRAG_ZOOM;
break;
}
}
@Override
public void mouseReleased(MouseEvent e) {
switch (e.getButton()) {
case (MouseEvent.BUTTON1):
dragmode = MOUSE_MODE.DRAG_ZOOM;
break;
case (MouseEvent.BUTTON2):
dragmode = MOUSE_MODE.DRAG_ROTATE;
break;
case (MouseEvent.BUTTON3):
dragmode = MOUSE_MODE.DRAG_ROTATE;
break;
}
dragstart = null;
}
@Override
public void mouseWheelMoved(MouseWheelEvent e) {
float zoom = e.getWheelRotation() * 0.1f;
zoom(zoom);
view.update();
}
};
KeyAdapter keyAdapter = new KeyAdapter() {
@Override
public void keyPressed(KeyEvent e) {
switch (e.getKeyChar()) {
case 'l':
model.setEnableShadow(model.getEnableShadow()==0 ? 1 : 0);
break;
case '1':
model.setEpsilon(model.getEpsilon() * 0.75f);
break;
case '2':
model.setEpsilon(model.getEpsilon() * 1.f / 0.75f);
break;
case '3':
model.setMaxIterations(max(1, model.getMaxIterations() -1));
break;
case '4':
model.setMaxIterations(min(12, model.getMaxIterations()+1));
break;
case '5':
model.setSuperSamplingSize(max(1, model.getSuperSamplingSize() -1));
break;
case '6':
model.setSuperSamplingSize(min(5, model.getSuperSamplingSize() +1));
break;
default:
break;
}
view.update();
}
};
component.addKeyListener(keyAdapter);
component.addMouseListener(mouseAdapter);
component.addMouseMotionListener(mouseAdapter);
component.addMouseWheelListener(mouseAdapter);
}
private void zoom(float zoom) {
Vec orig = model.getCamera().getOrig();
orig.setX(orig.getX()+zoom)
.setY(orig.getY()+zoom)
.setZ(orig.getZ()+zoom);
}
private void rotateLightX(float k) {
float[] light = model.getLight();
float y = light[1];
float z = light[2];
light[1] = (float) ( y * cos(k) + z * sin(k));
light[2] = (float) (-y * sin(k) + z * cos(k));
model.setLight(light);
}
private void rotateLightY(float k) {
float[] light = model.getLight();
float x = light[0];
float z = light[2];
light[0] = (float) (x * cos(k) - z * sin(k));
light[2] = (float) (x * sin(k) + z * cos(k));
model.setLight(light);
}
private void rotateCameraXbyOrig(double k) {
Vec orig = model.getCamera().getOrig();
float y = orig.getY();
float z = orig.getZ();
orig.setY((float) ( y * cos(k) + z * sin(k)));
orig.setZ((float) (-y * sin(k) + z * cos(k)));
}
private void rotateCameraYbyOrig(double k) {
Vec orig = model.getCamera().getOrig();
float x = orig.getX();
float z = orig.getZ();
orig.setX((float) (x * cos(k) - z * sin(k)));
orig.setZ((float) (x * sin(k) + z * cos(k)));
}
public final static void vadd(Vec v, Vec a, Vec b) {
v.setX(a.getX() + b.getX());
v.setY(a.getY() + b.getY());
v.setZ(a.getZ() + b.getZ());
}
public final static void vsub(Vec v, Vec a, Vec b) {
v.setX(a.getX() - b.getX());
v.setY(a.getY() - b.getY());
v.setZ(a.getZ() - b.getZ());
}
public final static void vmul(Vec v, float s, Vec b) {
v.setX(s * b.getX());
v.setY(s * b.getY());
v.setZ(s * b.getZ());
}
public final static float vdot(Vec a, Vec b) {
return a.getX() * b.getX()
+ a.getY() * b.getY()
+ a.getZ() * b.getZ();
}
public final static void vnorm(Vec v) {
float s = (float) (1.0f / sqrt(vdot(v, v)));
vmul(v, s, v);
}
public final static void vxcross(Vec v, Vec a, Vec b) {
v.setX(a.getY() * b.getZ() - a.getZ() * b.getY());
v.setY(a.getZ() * b.getX() - a.getX() * b.getZ());
v.setZ(a.getX() * b.getY() - a.getY() * b.getX());
}
}
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