OPENGL(12)

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#973

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Date: Tue, 05 May 1998 00:00

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BBSˮľ�廪վ�þ�����
������: yxy (��˿˿#���ߵ�С��ӥ), ����: GAME_Designer 
��  ��: OPENGL(12) 
����վ: BBS ˮľ�廪վ (Sun Feb 15 15:41:17 1998) 
 
�˴ν���OPENGL���ӽ�ģ��ʽ�����ּ���������ɣ���ƪ�Ƚ���ͼԭ��չ�� 
�������ר�ú���ȷ����ƽ��ͼ�Ρ��´λὲ��������÷�����������档 
1.����� 
void glPointSize(GLfloat size); 
���õ�Ŀ�ȣ�size����>0��ȱʡ1 
 
void glLineWidth(GLfoat width); 
�����߿?width>0��ȱʡΪ1 
 
void glLineStipple(GLint factor,GLushort pattern); 
�����ߵ�ģʽ��factor���ڶ�ģʽ��������ı������ӣ�pattern���ߵ�ģʽ 
����11001100�����ߣ�1���ƣ�0�����ƣ� 
 
����Ҫ����glEnable(GL_LINE_STIPPLE)����ʹ�����Ϻ�����ʹ��ʱ���� 
glDisable(GL_LINE_STIPPLE)�رգ�������ǰ��glEnable();glDisable();�� 
�÷��������Ƶġ��뿴�������ӣ� 
/////////////////////////////////////////////////////////////////// 
//sample.cpp 
#include "glos.h" 
#include <GL/gl.h> 
#include <GL/glaux.h> 
#include "windows.h" 
void myinit(void); 
void CALLBACK  display(void); 
void CALLBACK  reshape(GLsizei w,GLsizei h); 
 
 
void myinit(void) 
{ 
        auxInitDisplayMode(AUX_SINGLE|AUX_RGBA); 
        auxInitPosition(0,0,600,500); 
        auxInitWindow("sample1"); 
        glClearColor(0.0,0.0,0.0,0.0); 
        glClear(GL_COLOR_BUFFER_BIT); 
 
        glShadeModel(GL_FLAT); 
} 
/* 
void CALLBACK reshape(GLsizei w,GLsizei h) 
{ 
 
glViewport(0,0,w,h); 
glMatrixMode(GL_PROJECTION); 
glLoadIdentity(); 
 
if(w<=h) 
 glOrtho(-4.0,4.0,-4.0*(GLfloat)h/(GLfloat)w, 
         4.0*(GLfloat)h/(GLfloat)w,-4.0,4.0); 
else 
  glOrtho(-4.0*(GLfloat)h/(GLfloat)w, 
         4.0*(GLfloat)h/(GLfloat)w,-4.0,4.0,-4.0,4.0); 
glMatrixMode(GL_MODELVIEW); 
glLoadIdentity(); 
} 
*/ 
 
//�Զ���Ļ���ֱ�ߵĺ������Ϊ��ʼ�����ֹ����� 
void line2i(GLint x1,GLint y1,GLint x2,GLint y2) 
{ 
glBegin(GL_LINES); 
glVertex2f(x1,y1); 
glVertex2f(x2,y2); 
glEnd(); 
} 
 
void CALLBACK display(void) 
{ 
  glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT); 
 
//���Ȼ���һϵ�е㣬��Ĵ�С�������� 
  int i; 
  glColor3f(0.8,0.6,0.4); 
  for(i=1;i<=10;i++) 
  { 
          glPointSize(i*2); 
          glBegin(GL_POINTS); 
          glVertex2f(30.0+((GLfloat)i*50.0),330.0); 
          glEnd(); 
  } 
//�ٻ����������ߣ��ڶ����ȵ�һ����ɢһЩ����pattern����ɿ���  
  glEnable(GL_LINE_STIPPLE); 
  glLineStipple(1,0x0101);//���1λ 
  glColor3f(1.0,0.0,0.0); 
  line2i(20,250,250,250); 
  glLineStipple(1,0x00ff);//���2λ 
  glColor3f(0.0,0.0,1.0); 
  line2i(300,250,550,250); 
 
//�ı��ߵĻ��ƿ�ȵ�Ч��--�ӿ� 
//���»��������������� 
  glLineWidth(5.0); 
  glEnable(GL_LINE_STIPPLE); 
  glLineStipple(1,0x0101); 
  glColor3f(1.0,0.0,0.0); 
  line2i(50,150,250,150); 
  glLineStipple(1,0x00ff); 
  glColor3f(0.0,0.0,1.0); 
  line2i(300,150,550,150); 
 
  glFlush(); 
} 
void main(void) 
{ 
        myinit(); 
     
//    auxReshapeFunc(reshape); 
    auxMainLoop(display); 
} 
//end of sample 
////////////////////////////////////////////// 
 
2.����� 
void glPolygonMode(GLenum face,GLenum mode); 
���ƶ����ָ����Ļ�ͼģʽ�� 
faceΪ��GL_FRONT GL_BACK��GL_FRONT_AND BACK 
modeΪ��GL_POINT GL_LINE��GL_FILL��ʾ����͵������㡢�����ߺ����ģʽ 
�Ļ��Ʒ�ʽ��ȱʡ����䷽ʽ�� 
 
void glPolygonStipple(const GLubyte *mask); 
����mask������ָ��32*32��λͼָ�룬1�ǻ��ơ�0������ 
 
ʹ����������ҲҪ���ã� 
glEnable(GL_POLYGON-STIPPLE); 
glDisable(GL_POLYGON_STIPPLE); 
�뿴�������ӣ� 
///////////////////////////////////////////// 
//sample.cpp 
#include "glos.h" 
#include <GL/gl.h> 
#include <GL/glaux.h> 
#include "windows.h" 
void myinit(void); 
void CALLBACK  display(void); 
void CALLBACK  reshape(GLsizei w,GLsizei h); 
 
//�������ģʽ32*32���� 
GLubyte pattern[]={ 
        0x00,0x01,0x80,0x00, 
        0x00,0x03,0xc0,0x00, 
        0x00,0x07,0xe0,0x00, 
        0x00,0x0f,0xf0,0x00, 
        0x00,0x1f,0xf8,0x00, 
        0x00,0x3f,0xfc,0x00, 
        0x00,0x7f,0xfe,0x00, 
        0x00,0xff,0xff,0x00, 
        0x01,0xff,0xff,0x80, 
        0x03,0xff,0xff,0xc0, 
        0x07,0xff,0xff,0xe0, 
        0x0f,0xff,0xff,0xf0, 
        0x1f,0xff,0xff,0xf8, 
        0x3f,0xff,0xff,0xfc, 
        0x7f,0xff,0xff,0xfe, 
        0xff,0xff,0xff,0xff, 
     
        0xff,0xff,0xff,0xff, 
        0x7f,0xff,0xff,0xfe, 
        0x3f,0xff,0xff,0xfc, 
        0x1f,0xff,0xff,0xf8, 
        0x0f,0xff,0xff,0xf0, 
        0x07,0xff,0xff,0xe0, 
        0x03,0xff,0xff,0xc0, 
        0x01,0xff,0xff,0x80, 
        0x00,0xff,0xff,0x00, 
        0x00,0x7f,0xfe,0x00, 
        0x00,0x3f,0xfc,0x00, 
        0x00,0x1f,0xf8,0x00, 
        0x00,0x0f,0xf0,0x00, 
        0x00,0x07,0xe0,0x00, 
        0x00,0x03,0xc0,0x00, 
        0x00,0x01,0x80,0x00 
}; 
 
void myinit(void) 
{ 
    auxInitDisplayMode(AUX_SINGLE|AUX_RGBA); 
        auxInitPosition(0,0,400,400); 
        auxInitWindow("sample1"); 
        glClearColor(0.0,0.0,0.0,0.0); 
        glClear(GL_COLOR_BUFFER_BIT); 
 
        glShadeModel(GL_FLAT); 
} 
/* 
void CALLBACK reshape(GLsizei w,GLsizei h) 
{ 
 
glViewport(0,0,w,h); 
glMatrixMode(GL_PROJECTION); 
glLoadIdentity(); 
 
if(w<=h) 
 glOrtho(-4.0,4.0,-4.0*(GLfloat)h/(GLfloat)w, 
         4.0*(GLfloat)h/(GLfloat)w,-4.0,4.0); 
else 
  glOrtho(-4.0*(GLfloat)h/(GLfloat)w, 
         4.0*(GLfloat)h/(GLfloat)w,-4.0,4.0,-4.0,4.0); 
glMatrixMode(GL_MODELVIEW); 
glLoadIdentity(); 
} 
*/ 
 
void CALLBACK display(void) 
{ 
  glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT); 
//ѡ����ɫ��Ϊ���ɫ 
  glColor3f(0.0,0.0,1.0); 
//���ö���λ���ģʽ 
  glEnable(GL_POLYGON_STIPPLE);   
//���ö���õ����ģʽ���ƶ���� 
  glPolygonStipple(pattern); 
//���Ƴ����� 
  glRectf(48.0,80.0,210.0,305.0); 
 
  glFlush(); 
} 
void main(void) 
{ 
        myinit(); 
     
//    auxReshapeFunc(reshape); 
    auxMainLoop(display); 
} 
//end of sample 
�����е����н���Ǹ��һ�������ж���ͼ��ĳ����� 
 
-- 
�� ��Դ:��BBS ˮľ�廪վ bbs.net.tsinghua.edu.cn��[FROM: 166.111.74.90] 

BBSˮľ�廪վ�þ�����

�� ��Դ: �й�ƴ�BBSվ [bbs.ustc.edu.cn]

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From: Ambi_A@bbs.ustc.edu.cn (����)
Subject: OPENGL(12)
Date: 1998/05/05
Message-ID: <980505.yWbUt$PBBS@bbs.ustc.edu.cn>
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