#region License
/*
MIT License
Copyright 2003-2005 Tao Framework Team
http://www.taoframework.com
All rights reserved.
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/
#endregion License
using System;
using System.Reflection;
using System.Diagnostics.CodeAnalysis;
using SdlDotNet.Core;
using SdlDotNet.Graphics;
using SdlDotNet.Input;
using Tao.OpenGl;
namespace SdlDotNetExamples.RedBook{
/// <summary>
/// This program draws a NURBS surface in the shape of a symmetrical hill. The 'c'
/// keyboard key allows you to toggle the visibility of the control points
/// themselves. Note that some of the control points are hidden by the surface
/// itself.
/// </summary>
/// <remarks>
/// <para>
/// Original Author: Silicon Graphics, Inc.
/// http://www.opengl.org/developers/code/examples/redbook/stroke.c
/// </para>
/// <para>
/// C# Implementation: Randy Ridge
/// http://www.taoframework.com
/// </para>
/// <para>
/// SDL.NET implementation: David Hudson
/// http://cs-sdl.sourceforge.net
/// </para>
/// </remarks>
public class RedBookSurface
{
//Width of screen
int width = 500;
//Height of screen
int height = 500;
/// <summary>
/// Lesson title
/// </summary>
public static string Title
{
get
{
return "Surface - hill-shaped NURBS surface";
}
}
#region Private Fields
[SuppressMessage("Microsoft.Performance", "CA1814:PreferJaggedArraysOverMultidimensional", Justification = "Jagged Arrays are not CLS-compliant")]
private static float[, ,] controlPoints = new float[4, 4, 3];
private static bool showPoints;
private static Glu.GLUnurbs nurb;
#endregion Private Fields
#region Constructors
/// <summary>
/// Basic constructor
/// </summary>
public RedBookSurface()
{
Initialize();
}
#endregion Constructors
#region Lesson Setup
/// <summary>
/// Initializes methods common to all RedBook lessons
/// </summary>
private void Initialize()
{
// Sets keyboard events
Events.KeyboardDown += new EventHandler<KeyboardEventArgs>(this.KeyDown);
Keyboard.EnableKeyRepeat(150,50);
// Sets the ticker to update OpenGL Context
Events.Tick += new EventHandler<TickEventArgs>(this.Tick);
Events.Quit += new EventHandler<QuitEventArgs>(this.Quit);
// // Sets the resize window event
// Events.VideoResize += new EventHandler<VideoResizeEventArgs> (this.Resize);
// Set the Frames per second.
Events.Fps = 60;
// Sets Window icon and title
this.WindowAttributes();
// Creates SDL.NET Surface to hold an OpenGL scene
Video.SetVideoMode(width, height, true, true);
}
/// <summary>
/// Sets Window icon and caption
/// </summary>
private void WindowAttributes()
{
Video.WindowIcon();
Video.WindowCaption =
"SDL.NET - RedBook " +
this.GetType().ToString().Substring(26);
}
#endregion Lesson Setup
/// <summary>
/// Resizes window
/// </summary>
private void Reshape()
{
Reshape(this.width, this.height);
}
// --- Application Methods ---
#region Init()
/// <summary>
/// <para>
/// Initialize material property and depth buffer.
/// </para>
/// </summary>
private static void Init()
{
float[] materialDiffuse = {0.7f, 0.7f, 0.7f, 1.0f};
float[] materialSpecular = {1.0f, 1.0f, 1.0f, 1.0f};
float[] materialShininess = {100.0f};
Gl.glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
Gl.glMaterialfv(Gl.GL_FRONT, Gl.GL_DIFFUSE, materialDiffuse);
Gl.glMaterialfv(Gl.GL_FRONT, Gl.GL_SPECULAR, materialSpecular);
Gl.glMaterialfv(Gl.GL_FRONT, Gl.GL_SHININESS, materialShininess);
Gl.glEnable(Gl.GL_LIGHTING);
Gl.glEnable(Gl.GL_LIGHT0);
Gl.glEnable(Gl.GL_DEPTH_TEST);
Gl.glEnable(Gl.GL_AUTO_NORMAL);
Gl.glEnable(Gl.GL_NORMALIZE);
InitSurface();
nurb = Glu.gluNewNurbsRenderer();
Glu.gluNurbsProperty(nurb, Glu.GLU_SAMPLING_TOLERANCE, 25.0f);
Glu.gluNurbsProperty(nurb, Glu.GLU_DISPLAY_MODE, Glu.GLU_FILL);
Glu.gluNurbsCallback(nurb, Glu.GLU_ERROR, new Glu.NurbsErrorCallback(Error));
}
#endregion Init()
#region InitSurface()
private static void InitSurface()
{
int u, v;
for(u = 0; u < 4; u++)
{
for(v = 0; v < 4; v++)
{
controlPoints[u, v, 0] = 2.0f * ((float)u - 1.5f);
controlPoints[u, v, 1] = 2.0f * ((float)v - 1.5f);
if((u == 1 || u == 2) && (v == 1 || v == 2))
{
controlPoints[u, v, 2] = 3.0f;
}
else
{
controlPoints[u, v, 2] = -3.0f;
}
}
}
}
#endregion InitSurface()
// --- Callbacks ---
#region Display()
private static void Display()
{
float[] knots = {0, 0, 0, 0, 1, 1, 1, 1};
int i, j;
Gl.glClear(Gl.GL_COLOR_BUFFER_BIT | Gl.GL_DEPTH_BUFFER_BIT);
Gl.glPushMatrix();
Gl.glRotatef(330, 1, 0, 0);
Gl.glScalef(0.5f, 0.5f, 0.5f);
Glu.gluBeginSurface(nurb);
Glu.gluNurbsSurface(nurb, 8, knots, 8, knots, 4 * 3, 3, controlPoints, 4, 4, Gl.GL_MAP2_VERTEX_3);
Glu.gluEndSurface(nurb);
if(showPoints)
{
Gl.glPointSize(5.0f);
Gl.glDisable(Gl.GL_LIGHTING);
Gl.glColor3f(1, 1, 0);
Gl.glBegin(Gl.GL_POINTS);
for(i = 0; i < 4; i++)
{
for(j = 0; j < 4; j++)
{
Gl.glVertex3f(controlPoints[i, j, 0], controlPoints[i, j, 1], controlPoints[i, j, 2]);
}
}
Gl.glEnd();
Gl.glEnable(Gl.GL_LIGHTING);
}
Gl.glPopMatrix();
Gl.glFlush();
}
#endregion Display()
#region Error(int errorCode)
private static void Error(int errorCode)
{
Console.WriteLine("Nurbs Error: {0}", Glu.gluErrorString(errorCode));
Environment.Exit(1);
}
#endregion Error(int errorCode)
#region Reshape(int w, int h)
private static void Reshape(int w, int h)
{
Gl.glViewport(0, 0, w, h);
Gl.glMatrixMode(Gl.GL_PROJECTION);
Gl.glLoadIdentity();
Glu.gluPerspective(45.0, (double) w / (double) h, 3.0, 8.0);
Gl.glMatrixMode(Gl.GL_MODELVIEW);
Gl.glLoadIdentity();
Gl.glTranslatef(0.0f, 0.0f, -5.0f);
}
#endregion Reshape(int w, int h)
#region Event Handlers
private void KeyDown(object sender, KeyboardEventArgs e)
{
switch (e.Key)
{
case Key.Escape:
// Will stop the app loop
Events.QuitApplication();
break;
case Key.C:
showPoints = !showPoints;
break;
default:
break;
}
}
private void Tick(object sender, TickEventArgs e)
{
Display();
Video.GLSwapBuffers();
}
private void Quit(object sender, QuitEventArgs e)
{
Events.QuitApplication();
}
// private void Resize (object sender, VideoResizeEventArgs e)
// {
// Video.SetVideoMode(e.Width, e.Height, true);
// if (screen.Width != e.Width || screen.Height != e.Height)
// {
// //this.Init();
// this.RedBook t = new RedBook(); t.Reshape();
// }
// }
#endregion Event Handlers
#region Run Loop
/// <summary>
/// Starts demo
/// </summary>
public static void Run()
{
RedBookSurface t = new RedBookSurface(); t.Reshape();
Init();
Events.Run();
}
#endregion Run Loop
}
}
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