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/**
* Copyright (c) 2013, Mattias Andrée
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package v;
import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
import java.util.*;
import static v.VMaths.*;
public class D3
{
static final float DEGREES_PER_SECOND = 50f / 1000f;
static final float[][] UNIT = {{1, 0, 0}, {0, 1, 0}, {0, 0, 1}};
static float[] xs = new float[8];
static float[] ys = new float[8];
static float[] zs = new float[8];
static float[] normal_xs = {0f, 0f, 1f, -1f, 0f, 0f};
static float[] normal_ys = {1f, 0f, 0f, 0f, 0f, -1f};
static float[] normal_zs = {0f, 1f, 0f, 0f, -1f, 0f};
static float[] rotation = {1f, 0f, 0f};
static float rotation_speed = 0f;
static int rx = 0;
static int ry = 0;
static int rxy = 0;
public static void main(String... args) throws InterruptedException
{
for (int i = 0; i < 8; i++)
{
xs[i] = ((i & 1) != 0 ? 1f : 0f) - 0.5f;
ys[i] = ((i & 2) != 0 ? 1f : 0f) - 0.5f;
zs[i] = ((i & 4) != 0 ? 1f : 0f) - 0.5f;
}
final JFrame window = new JFrame();
final JPanel panel;
window.pack();
window.setLayout(new BorderLayout());
window.add(panel = new JPanel()
{
{
this.setBackground(Color.BLACK);
}
@Override
public void paint(Graphics g)
{
super.paint(g);
/* */
int[] z = new int[6];
for (int i = 0; i < 6; i++)
{
int v = (int)(normal_zs[i] * 1000f);
z[i] = (v << 8) | i;
}
Arrays.sort(z);
for (int i = 0; i < 6; i++)
{
int side = z[i] & 7;
switch (side)
{
case 0: draw(188, 188, 188, 0, 1, 5, 4, g, normal_zs[0]); break;
case 1: draw(188, 0, 0, 0, 1, 3, 2, g, normal_zs[1]); break;
case 2: draw( 0, 188, 0, 0, 2, 6, 4, g, normal_zs[2]); break;
case 3: draw( 0, 0, 188, 1, 3, 7, 5, g, normal_zs[3]); break;
case 4: draw(188, 128, 0, 4, 5, 7, 6, g, normal_zs[4]); break;
case 5: draw(188, 188, 0, 2, 3, 7, 6, g, normal_zs[5]); break;
}
}
/* */
/* */
draw(new Color(255, 0, 0), 0, 1, g);
draw(new Color( 0, 0, 255), 0, 2, g);
draw(new Color(210, 0, 210), 0, 4, g);
draw(new Color(255, 255, 0), 1, 3, g);
draw(new Color(210, 128, 0), 1, 5, g);
draw(new Color( 0, 255, 0), 2, 3, g);
draw(new Color( 0, 210, 210), 2, 6, g);
draw(new Color(188, 210, 0), 3, 7, g);
draw(new Color(188, 0, 0), 4, 5, g);
draw(new Color( 0, 0, 188), 4, 6, g);
draw(new Color(188, 188, 0), 5, 7, g);
draw(new Color( 0, 188, 0), 6, 7, g);
/* */
}
private void draw(int R, int G, int B, int a, int b, int c, int d, Graphics g, float normal_z)
{
int A = (int)(255f * normal_z);
if (A > 0)
{
A = A / 2 + 128;
if (A > 255)
A = 255;
g.setColor(new Color(R, G, B, A));
g.fillPolygon(new int[] {Px(a), Px(b), Px(c), Px(d)},
new int[] {Py(a), Py(b), Py(c), Py(d)}, 4);
}
}
private void draw(Color colour, int i, int j, Graphics g)
{
g.setColor(colour);
g.drawLine(Px(i), Py(i), Px(j), Py(j));
}
static final float SCREEN_Z = 50f;
static final float MODEL_Z = 55f;
static final float VIEWER_Z = 50f;
static final float VIEWER_X = 0f;
static final float VIEWER_Y = 0f;
static final float CAMERA_Z = 10f;
static final float CAMERA_X = 0f;
static final float CAMERA_Y = 0f;
private int Px(int i)
{
/* Orthogonal projection */
//float z = SCREEN_Z / (zs[i] + MODEL_Z);
//return (int)(xs[i] * z * 300f + 400f);
/* Perspective projection */
float model_z = zs[i] + MODEL_Z;
float model_x = xs[i];
float p = VIEWER_Z / (model_z - CAMERA_Z) * (model_x - CAMERA_X) - VIEWER_X;
return (int)(p * 300f + 400f);
}
private int Py(int i)
{
/* Orthogonal projection */
//float z = SCREEN_Z / (zs[i] + MODEL_Z);
//return (int)(ys[i] * z * 300f + 300f);
/* Perspective projection */
float model_z = zs[i] + MODEL_Z;
float model_y = ys[i];
float p = VIEWER_Z / (model_z - CAMERA_Z) * (model_y - CAMERA_Y) - VIEWER_Y;
return (int)(p * 300f + 300f);
}
});
window.setBackground(Color.BLACK);
final Insets in = window.getInsets();
window.setSize(new Dimension(in.left + 800 + in.right, in.top + 600 + in.bottom));
window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
window.setVisible(true);
final float SPEED = (float)(Math.sqrt(25.5f / 2f)) * DEGREES_PER_SECOND;
window.addKeyListener(new KeyListener()
{
public void keyTyped(KeyEvent e) {}
public void keyReleased(KeyEvent e)
{
switch (e.getKeyCode())
{
case KeyEvent.VK_D: rx = 0; break;
case KeyEvent.VK_A: rx = 0; break;
case KeyEvent.VK_W: ry = 0; break;
case KeyEvent.VK_S: ry = 0; break;
case KeyEvent.VK_E: rxy = 0; break;
case KeyEvent.VK_Q: rxy = 0; break;
}
}
public void keyPressed(KeyEvent e)
{
switch (e.getKeyCode())
{
case KeyEvent.VK_D: rx = +1; break;
case KeyEvent.VK_A: rx = -1; break;
case KeyEvent.VK_W: ry = +1; break;
case KeyEvent.VK_S: ry = -1; break;
case KeyEvent.VK_E: rxy = +1; break;
case KeyEvent.VK_Q: rxy = -1; break;
case KeyEvent.VK_R:
rotation_speed = 0;
break;
}
}
});
for (;;)
{
Thread.sleep(50);
if (rx != 0)
{
float[] v = mul(rx * SPEED, createRotation("x"));
v = add(mul(rotation_speed, rotation), v);
rotation_speed = length(v);
rotation = normalise(v);
}
if (ry != 0)
{
float[] v = mul(ry * SPEED, createRotation("y"));
v = add(mul(rotation_speed, rotation), v);
rotation_speed = length(v);
rotation = normalise(v);
}
if (rxy != 0)
{
float[] v = mul(rxy * SPEED, createRotation("xy"));
v = add(mul(rotation_speed, rotation), v);
rotation_speed = length(v);
rotation = normalise(v);
}
if (rotation_speed != 0)
transform(createRotation(rotation, rotation_speed));
panel.repaint();
}
}
public static void transform(float[][] m)
{
/* This is not a transformation of the object, but
* rather its projection onto the screen. (This
* program combines the object and the projection.) */
for (int i = 0; i < 8; i++)
{
float[] v = mul(m, xs[i], ys[i], zs[i]);
xs[i] = v[0];
ys[i] = v[1];
zs[i] = v[2];
}
for (int i = 0; i < 6; i++)
{
float[] v = mul(m, normal_xs[i], normal_ys[i], normal_zs[i]);
normal_xs[i] = v[0];
normal_ys[i] = v[1];
normal_zs[i] = v[2];
}
}
}
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