karaj.designer
15th December 2013, 08:18 PM
سلام دوستان و اساتید
من چند تا برنامه ی opengl گرفتم که وقتی اجراشون می کنم،به جای اینکه خروجی ظاهر شه.
صفحه سفید می شه.
مشکل از چیه؟
مثلا همین برنامه ای که آقای ادمین گذاشتن توو سایت
ستاره ای که با کیبورد جابه جا میشه
این کدش:
#include"stdafx.h"#include<iostream>
#include<glut.h>
#include <math.h>
// Define a constant for the value of PI
#define GL_PI 3.1415f
// Rotation amounts
static GLfloat xRot = 0.0f;
static GLfloat yRot = 0.0f;
// Flags for effects
#define MODE_SOLID 0
#define MODE_LINE 1
#define MODE_POINT 2
int iMode = MODE_SOLID;
GLboolean bEdgeFlag = TRUE;
///////////////////////////////////////////////////////////////////////////////
// Reset flags as appropriate in response to menu selections
void ProcessMenu(int value)
{
switch(value)
{
case 1:
iMode = MODE_SOLID;
break;
case 2:
iMode = MODE_LINE;
break;
case 3:
iMode = MODE_POINT;
break;
case 4:
bEdgeFlag = TRUE;
break;
case 5:
default:
bEdgeFlag = FALSE;
break;
}
glutPostRedisplay();
}
// Called to draw scene
void RenderScene(void)
{
// Clear the window
glClear(GL_COLOR_BUFFER_BIT);
// Draw back side as a polygon only, if flag is set
if(iMode == MODE_LINE)
glPolygonMode(GL_FRONT_AND_BACK,GL_LINE);
if(iMode == MODE_POINT)
glPolygonMode(GL_FRONT_AND_BACK,GL_POINT);
if(iMode == MODE_SOLID)
glPolygonMode(GL_FRONT_AND_BACK,GL_FILL);
// Save matrix state and do the rotation
glPushMatrix();
glRotatef(xRot, 1.0f, 0.0f, 0.0f);
glRotatef(yRot, 0.0f, 1.0f, 0.0f);
// Begin the triangles
glBegin(GL_TRIANGLES);
glEdgeFlag(bEdgeFlag);
glVertex2f(-20.0f, 0.0f);
glEdgeFlag(TRUE);
glVertex2f(20.0f, 0.0f);
glVertex2f(0.0f, 40.0f);
glVertex2f(-20.0f,0.0f);
glVertex2f(-60.0f,-20.0f);
glEdgeFlag(bEdgeFlag);
glVertex2f(-20.0f,-40.0f);
glEdgeFlag(TRUE);
glVertex2f(-20.0f,-40.0f);
glVertex2f(0.0f, -80.0f);
glEdgeFlag(bEdgeFlag);
glVertex2f(20.0f, -40.0f);
glEdgeFlag(TRUE);
glVertex2f(20.0f, -40.0f);
glVertex2f(60.0f, -20.0f);
glEdgeFlag(bEdgeFlag);
glVertex2f(20.0f, 0.0f);
glEdgeFlag(TRUE);
// Center square as two triangles
glEdgeFlag(bEdgeFlag);
glVertex2f(-20.0f, 0.0f);
glVertex2f(-20.0f,-40.0f);
glVertex2f(20.0f, 0.0f);
glVertex2f(-20.0f,-40.0f);
glVertex2f(20.0f, -40.0f);
glVertex2f(20.0f, 0.0f);
glEdgeFlag(TRUE);
// Done drawing Triangles
glEnd();
// Restore transformations
glPopMatrix();
// Flush drawing commands
glutSwapBuffers();
}
// This function does any needed initialization on the rendering
// context.
void SetupRC()
{
// Black background
glClearColor(0.0f, 0.0f, 0.0f, 1.0f );
// Set drawing color to green
glColor3f(0.0f, 1.0f, 0.0f);
}
void SpecialKeys(int key, int x, int y)
{
if(key == GLUT_KEY_UP)
xRot-= 5.0f;
if(key == GLUT_KEY_DOWN)
xRot += 5.0f;
if(key == GLUT_KEY_LEFT)
yRot -= 5.0f;
if(key == GLUT_KEY_RIGHT)
yRot += 5.0f;
if(key > 356.0f)
xRot = 0.0f;
if(key < -1.0f)
xRot = 355.0f;
if(key > 356.0f)
yRot = 0.0f;
if(key < -1.0f)
yRot = 355.0f;
// Refresh the Window
glutPostRedisplay();
}
void ChangeSize(int w, int h)
{
GLfloat nRange = 100.0f;
// Prevent a divide by zero
if(h == 0)
h = 1;
// Set Viewport to window dimensions
glViewport(0, 0, w, h);
// Reset projection matrix stack
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
// Establish clipping volume (left, right, bottom, top, near, far)
if (w <= h)
glOrtho (-nRange, nRange, -nRange*h/w, nRange*h/w, -nRange, nRange);
else
glOrtho (-nRange*w/h, nRange*w/h, -nRange, nRange, -nRange, nRange);
// Reset Model view matrix stack
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
}
int main(int argc, char* argv[])
{
int nModeMenu;
int nEdgeMenu;
int nMainMenu;
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH);
glutCreateWindow("Solid and Outlined Star");
// Create the Menu
nModeMenu = glutCreateMenu(ProcessMenu);
glutAddMenuEntry("Solid",1);
glutAddMenuEntry("Outline",2);
glutAddMenuEntry("Points",3);
nEdgeMenu = glutCreateMenu(ProcessMenu);
glutAddMenuEntry("On",4);
glutAddMenuEntry("Off",5);
nMainMenu = glutCreateMenu(ProcessMenu);
glutAddSubMenu("Mode", nModeMenu);
glutAddSubMenu("Edges", nEdgeMenu);
glutAttachMenu(GLUT_RIGHT_BUTTON);
glutReshapeFunc(ChangeSize);
glutSpecialFunc(SpecialKeys);
glutDisplayFunc(RenderScene);
SetupRC();
glutMainLoop();
return 0;
}
لطفا راهنمایی بفرمایید
من چند تا برنامه ی opengl گرفتم که وقتی اجراشون می کنم،به جای اینکه خروجی ظاهر شه.
صفحه سفید می شه.
مشکل از چیه؟
مثلا همین برنامه ای که آقای ادمین گذاشتن توو سایت
ستاره ای که با کیبورد جابه جا میشه
این کدش:
#include"stdafx.h"#include<iostream>
#include<glut.h>
#include <math.h>
// Define a constant for the value of PI
#define GL_PI 3.1415f
// Rotation amounts
static GLfloat xRot = 0.0f;
static GLfloat yRot = 0.0f;
// Flags for effects
#define MODE_SOLID 0
#define MODE_LINE 1
#define MODE_POINT 2
int iMode = MODE_SOLID;
GLboolean bEdgeFlag = TRUE;
///////////////////////////////////////////////////////////////////////////////
// Reset flags as appropriate in response to menu selections
void ProcessMenu(int value)
{
switch(value)
{
case 1:
iMode = MODE_SOLID;
break;
case 2:
iMode = MODE_LINE;
break;
case 3:
iMode = MODE_POINT;
break;
case 4:
bEdgeFlag = TRUE;
break;
case 5:
default:
bEdgeFlag = FALSE;
break;
}
glutPostRedisplay();
}
// Called to draw scene
void RenderScene(void)
{
// Clear the window
glClear(GL_COLOR_BUFFER_BIT);
// Draw back side as a polygon only, if flag is set
if(iMode == MODE_LINE)
glPolygonMode(GL_FRONT_AND_BACK,GL_LINE);
if(iMode == MODE_POINT)
glPolygonMode(GL_FRONT_AND_BACK,GL_POINT);
if(iMode == MODE_SOLID)
glPolygonMode(GL_FRONT_AND_BACK,GL_FILL);
// Save matrix state and do the rotation
glPushMatrix();
glRotatef(xRot, 1.0f, 0.0f, 0.0f);
glRotatef(yRot, 0.0f, 1.0f, 0.0f);
// Begin the triangles
glBegin(GL_TRIANGLES);
glEdgeFlag(bEdgeFlag);
glVertex2f(-20.0f, 0.0f);
glEdgeFlag(TRUE);
glVertex2f(20.0f, 0.0f);
glVertex2f(0.0f, 40.0f);
glVertex2f(-20.0f,0.0f);
glVertex2f(-60.0f,-20.0f);
glEdgeFlag(bEdgeFlag);
glVertex2f(-20.0f,-40.0f);
glEdgeFlag(TRUE);
glVertex2f(-20.0f,-40.0f);
glVertex2f(0.0f, -80.0f);
glEdgeFlag(bEdgeFlag);
glVertex2f(20.0f, -40.0f);
glEdgeFlag(TRUE);
glVertex2f(20.0f, -40.0f);
glVertex2f(60.0f, -20.0f);
glEdgeFlag(bEdgeFlag);
glVertex2f(20.0f, 0.0f);
glEdgeFlag(TRUE);
// Center square as two triangles
glEdgeFlag(bEdgeFlag);
glVertex2f(-20.0f, 0.0f);
glVertex2f(-20.0f,-40.0f);
glVertex2f(20.0f, 0.0f);
glVertex2f(-20.0f,-40.0f);
glVertex2f(20.0f, -40.0f);
glVertex2f(20.0f, 0.0f);
glEdgeFlag(TRUE);
// Done drawing Triangles
glEnd();
// Restore transformations
glPopMatrix();
// Flush drawing commands
glutSwapBuffers();
}
// This function does any needed initialization on the rendering
// context.
void SetupRC()
{
// Black background
glClearColor(0.0f, 0.0f, 0.0f, 1.0f );
// Set drawing color to green
glColor3f(0.0f, 1.0f, 0.0f);
}
void SpecialKeys(int key, int x, int y)
{
if(key == GLUT_KEY_UP)
xRot-= 5.0f;
if(key == GLUT_KEY_DOWN)
xRot += 5.0f;
if(key == GLUT_KEY_LEFT)
yRot -= 5.0f;
if(key == GLUT_KEY_RIGHT)
yRot += 5.0f;
if(key > 356.0f)
xRot = 0.0f;
if(key < -1.0f)
xRot = 355.0f;
if(key > 356.0f)
yRot = 0.0f;
if(key < -1.0f)
yRot = 355.0f;
// Refresh the Window
glutPostRedisplay();
}
void ChangeSize(int w, int h)
{
GLfloat nRange = 100.0f;
// Prevent a divide by zero
if(h == 0)
h = 1;
// Set Viewport to window dimensions
glViewport(0, 0, w, h);
// Reset projection matrix stack
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
// Establish clipping volume (left, right, bottom, top, near, far)
if (w <= h)
glOrtho (-nRange, nRange, -nRange*h/w, nRange*h/w, -nRange, nRange);
else
glOrtho (-nRange*w/h, nRange*w/h, -nRange, nRange, -nRange, nRange);
// Reset Model view matrix stack
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
}
int main(int argc, char* argv[])
{
int nModeMenu;
int nEdgeMenu;
int nMainMenu;
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH);
glutCreateWindow("Solid and Outlined Star");
// Create the Menu
nModeMenu = glutCreateMenu(ProcessMenu);
glutAddMenuEntry("Solid",1);
glutAddMenuEntry("Outline",2);
glutAddMenuEntry("Points",3);
nEdgeMenu = glutCreateMenu(ProcessMenu);
glutAddMenuEntry("On",4);
glutAddMenuEntry("Off",5);
nMainMenu = glutCreateMenu(ProcessMenu);
glutAddSubMenu("Mode", nModeMenu);
glutAddSubMenu("Edges", nEdgeMenu);
glutAttachMenu(GLUT_RIGHT_BUTTON);
glutReshapeFunc(ChangeSize);
glutSpecialFunc(SpecialKeys);
glutDisplayFunc(RenderScene);
SetupRC();
glutMainLoop();
return 0;
}
لطفا راهنمایی بفرمایید