000
21.05.2008, 11:20 Uhr
WindDancer1
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Hallo Leute  ,
ich habe einen kleinen Code geschrieben mit OpenGl + SDL + M$VC++ 6.
Es wird eine Textur auf ein Rechteck gelegt welches dann um die Y - Achse gedreht wir.
Unter Linux wird der Source "normal" schnell, also wie erwartet ausgefüht aber unter Windows extrem langsam  
Hier mal mein Code:
| C++: |
#include <windows.h> // Header File For Windows
#include <stdio.h>
#include <GL\gl.h>
#include <GL\glu.h>
#include <GL\glaux.h>
#include <SDL\SDL.h>
// #ifdef _WIN32
// #undef main
// #endif
GLuint texture[1];
int LoadGLTextures( )
{
/* Status indicator */
int Status = 0;
/* Create storage space for the texture */
SDL_Surface *TextureImage[1];
/* Load The Bitmap, Check For Errors, If Bitmap's Not Found Quit */
if ( ( TextureImage[0] = SDL_LoadBMP( "data/nehe.bmp" ) ) )
{
/* Set the status to true */
Status = 1;
/* Create The Texture */
glGenTextures( 1, &texture[0] );
/* Typical Texture Generation Using Data From The Bitmap */
glBindTexture( GL_TEXTURE_2D, texture[0] );
/* Generate The Texture */
glTexImage2D( GL_TEXTURE_2D, 0, 3, TextureImage[0]->w,
TextureImage[0]->h, 0, GL_RGB, GL_UNSIGNED_BYTE, TextureImage[0]->pixels );
/* Linear Filtering */
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
}
/* Free up any memory we may have used */
if ( TextureImage[0] )
SDL_FreeSurface( TextureImage[0] );
return Status;
}
int main()
{
float angle=0;
int i;
if (SDL_Init (SDL_INIT_VIDEO)!=0)
{
printf ("Error: %s\n", SDL_GetError ());
return 1;
}
atexit (SDL_Quit);
SDL_GL_SetAttribute (SDL_GL_DOUBLEBUFFER, 1);
SDL_GL_SetAttribute (SDL_GL_RED_SIZE, 5);
SDL_GL_SetAttribute (SDL_GL_GREEN_SIZE, 6);
SDL_GL_SetAttribute (SDL_GL_BLUE_SIZE, 5);
if (SDL_SetVideoMode (640, 480, 16, SDL_OPENGL)==NULL)
{
printf ("Error: %s\n", SDL_GetError ());
return 1;
}
SDL_WM_SetCaption ("OpenGL with SDL!", "OpenGL");
glViewport (80, 0, 480, 480);
glMatrixMode (GL_PROJECTION);
glLoadIdentity ();
glFrustum (-1.0, 1.0, -1.0, 1.0, 1.0, 100.0);
glClearColor (0, 0, 0, 0);
glMatrixMode (GL_MODELVIEW);
LoadGLTextures ();
glEnable (GL_TEXTURE_2D);
/* glShadeModel (GL_SMOOTH); */
for (i=0;i<360*10*3;i++)
{
angle=(i/10)%360;
glLoadIdentity ();
glClear (GL_COLOR_BUFFER_BIT);
glTranslatef (0, 0, -2);
glRotatef (angle, 0, 1, 0);
glBegin (GL_QUADS);
// glColor3f (1, 0, 0);
glTexCoord2f (0, 0); glVertex3f (-1, -1, 0);
// glColor3f (0, 1, 0);
glTexCoord2f (1, 0); glVertex3f (1, -1, 0);
// glColor3f (1, 1, 0);
glTexCoord2f (1, 1); glVertex3f (1, 1, 0);
// glColor3f (0, 0, 1);
glTexCoord2f (0, 1); glVertex3f (-1, 1, 0);
glEnd ();
SDL_GL_SwapBuffers ();
}
glFlush ();
SDL_Delay (1000);
return 0;
}
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...ich steh set Tagen vor einem Rätsel 
Könnt Ihr mir weiterhelfen??? 
Vielen Dank für eure Mühe vorab 
WindDancer |
