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1 /*******************************************************************************
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2 * Copyright (c) 2000, 2005 IBM Corporation and others.
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3 * All rights reserved. This program and the accompanying materials
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4 * are made available under the terms of the Eclipse Public License v1.0
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5 * which accompanies this distribution, and is available at
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6 * http://www.eclipse.org/legal/epl-v10.html
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7 *
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8 * Contributors:
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9 * IBM Corporation - initial API and implementation
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10 * Port to the D Programming Language:
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11 * John Reimer <terminal.node@gmail.com>
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12 *******************************************************************************/
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13
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14 module snippets.opengl.Snippet195;
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15
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16 /*
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17 * SWT OpenGL snippet: based on snippet195.java
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18 *
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19 * For a list of all SWT example snippets see
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20 * http://www.eclipse.org/swt/snippets/
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21 *
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22 * @since 3.2
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23 */
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24
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25 import dwt.DWT;
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26 import dwt.dwthelper.Runnable;
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27
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28 import dwt.layout.FillLayout;
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29 import dwt.widgets.Shell;
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30 import dwt.widgets.Display;
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31 import dwt.widgets.Event;
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32 import dwt.widgets.Composite;
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33 import dwt.widgets.Listener;
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34 import dwt.graphics.Rectangle;
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35 import dwt.opengl.GLCanvas;
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36 import dwt.opengl.GLData;
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37
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38 import derelict.opengl.gl;
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39 import derelict.opengl.glu;
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40
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41 import Math = tango.math.Math;
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42
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43 void drawTorus(float r, float R, int nsides, int rings)
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44 {
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45 float ringDelta = 2.0f * cast(float) Math.PI / rings;
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46 float sideDelta = 2.0f * cast(float) Math.PI / nsides;
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47 float theta = 0.0f, cosTheta = 1.0f, sinTheta = 0.0f;
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48 for (int i = rings - 1; i >= 0; i--) {
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49 float theta1 = theta + ringDelta;
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50 float cosTheta1 = cast(float) Math.cos(theta1);
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51 float sinTheta1 = cast(float) Math.sin(theta1);
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52 glBegin(GL_QUAD_STRIP);
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53 float phi = 0.0f;
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54 for (int j = nsides; j >= 0; j--) {
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55 phi += sideDelta;
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56 float cosPhi = cast(float) Math.cos(phi);
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57 float sinPhi = cast(float) Math.sin(phi);
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58 float dist = R + r * cosPhi;
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59 glNormal3f(cosTheta1 * cosPhi, -sinTheta1 * cosPhi, sinPhi);
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60 glVertex3f(cosTheta1 * dist, -sinTheta1 * dist, r * sinPhi);
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61 glNormal3f(cosTheta * cosPhi, -sinTheta * cosPhi, sinPhi);
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62 glVertex3f(cosTheta * dist, -sinTheta * dist, r * sinPhi);
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63 }
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64 glEnd();
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65 theta = theta1;
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66 cosTheta = cosTheta1;
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67 sinTheta = sinTheta1;
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68 }
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69 }
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70
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71 void main()
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72 {
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73 DerelictGL.load();
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74 DerelictGLU.load();
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75
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76 Display display = new Display();
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77 Shell shell = new Shell(display);
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78 shell.setLayout(new FillLayout());
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79 Composite comp = new Composite(shell, DWT.NONE);
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80 comp.setLayout(new FillLayout());
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81 GLData data = new GLData ();
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82 data.doubleBuffer = true;
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83 GLCanvas canvas = new GLCanvas(comp, DWT.NONE, data);
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84
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85 canvas.setCurrent();
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86
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87 canvas.addListener(DWT.Resize, new class() Listener {
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88 public void handleEvent(Event event) {
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89 Rectangle bounds = canvas.getBounds();
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90 float fAspect = cast(float) bounds.width / cast(float) bounds.height;
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91
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92 glViewport(0, 0, bounds.width, bounds.height);
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93 glMatrixMode(GL_PROJECTION);
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94 glLoadIdentity();
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95 gluPerspective(45.0f, fAspect, 0.5f, 400.0f);
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96 glMatrixMode(GL_MODELVIEW);
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97 glLoadIdentity();
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98 }
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99 });
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100
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101 glClearColor(1.0f, 1.0f, 1.0f, 1.0f);
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102 glColor3f(1.0f, 0.0f, 0.0f);
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103 glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
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104 glClearDepth(1.0);
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105 glLineWidth(2);
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106 glEnable(GL_DEPTH_TEST);
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107
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108 shell.setText("DWT/DerelictGL Example");
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109 shell.setSize(640, 480);
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110 shell.open();
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111
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112 display.asyncExec(new class() Runnable {
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113 int rot = 0;
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114 public void run() {
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115 if (!canvas.isDisposed()) {
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116 canvas.setCurrent();
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117
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118 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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119 glClearColor(.3f, .5f, .8f, 1.0f);
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120 glLoadIdentity();
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121 glTranslatef(0.0f, 0.0f, -10.0f);
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122 float frot = rot;
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123 glRotatef(0.15f * rot, 2.0f * frot, 10.0f * frot, 1.0f);
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124 glRotatef(0.3f * rot, 3.0f * frot, 1.0f * frot, 1.0f);
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125 rot++;
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126 glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
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127 glColor3f(0.9f, 0.9f, 0.9f);
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128 drawTorus(1, 1.9f + (cast(float) Math.sin((0.004f * frot))), 15, 15);
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129 canvas.swapBuffers();
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130 display.asyncExec(this);
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131 }
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132 }
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133 });
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134
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135 while (!shell.isDisposed()) {
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136 if (!display.readAndDispatch())
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137 display.sleep();
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138 }
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139 display.dispose();
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140 }
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141
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