Thread View: cn.bbs.comp.program
1 messages
1 total messages
Started by ����
Tue, 05 May 1998 00:00
OPENGL(2)
Author: ����
Date: Tue, 05 May 1998 00:00
Date: Tue, 05 May 1998 00:00
194 lines
7734 bytes
7734 bytes
BBSˮľ�廪վ�þ�����
������: yxy (��˿˿#���ߵ�С��ӥ), ����: GAME_Designer
�� ��: OPENGL(2)
����վ: BBS ˮľ�廪վ (Thu Jan 8 18:28:19 1998)
[�������]
�����ҽ����һ��С�����ô����Ϥ�ø����ı�̽ṹ��
// GLOS.H
//////////////////////////////////////////////////////////
// This is an OS specific header file
//�б����ϵͳ�Ļ�ͷ�ļ�
#include <windows.h>
// disable data conversion warnings
#pragma warning(disable : 4244) // MIPS
#pragma warning(disable : 4136) // X86
#pragma warning(disable : 4051) // ALPHA
//////////////////////////////////////////////////////////
//opengl.cpp
//������
#include "glos.h"
#include <GL/gl.h>
#include <GL/glaux.h>
#include "windows.h"
void main(void)
{
/*��ʼ����*/
auxInitDisplayMode(AUX_SINGLE|AUX_RGBA);
//������ʾ�������RGB����ɫ��ģʽ
auxInitPosition(0,0,500,500);
//��Сx=500 y=500 ��0��0������Ļ���ϵ�
auxInitWindow("sample1");
//���ڳ�ʼ���������DZ���
glClearColor(0.0,0.0,0.0,0.0);
//��������Ϊ��ɫ
glClear(GL_COLOR_BUFFER_BIT);
//����ɫ������ΪglClearColor���������õ���ɫ
//������ɫ
/*��ͼ*/
glColor3f(1.0,0.0,0.0);
//ѡ��ɫ��R��G��B��������0<x<1��������Ǻ�ɫ
glRectf(-0.5,-0.5,0.5,0.5);
//��������
glFlush();
//ǿ�ƻ�ͼ����פ������
_sleep(1000);
//windows������ʾ1�루��λ�Ǻ��룩
}
//end of sample
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�������DZ��뱻�Ȳ��ò���ѧЩ������
1.OPENGL�������������
������
ǰ ���� ��ӦC����
b 8-bit int signed char
s 16-bit int short
i 32-bit int long
f 32-bit float float
d 64-bit float double
ub 8-bit unsigned int unsigned char
us 16-bit unsigned int unsigned short
ui 32-bit unsigned int unsigned long
����1.0fʵ�ʾ���1.0��һ��д��1.0f����ȥ�ñ���һЩ��
����
������������������
���磺glVertex2i(2,4)������opengl����gl-��
�ǻ��ĺ���-Vertex-��
���������Ͳ���-2i��
������һ��������ͷȥβ��֪�����Ǹ�ʲô���֡�
2.CALLBACK����
��һЩ������ϵͳ���õĺ���ϵͳҪ�������ǣ�������ʾ�����ܼ�������...
��ͺñ���ľһ������������������ʼ����˳��һ���ؽ�Ҫ����
ϵͳ���Զ�ִ�����ǣ����磺
void CALLBACK display(void)����д�����뻭ʲô������Ȼ����������ʹ��
auxMainLoop(display);�Ϳ������������һֱ��ʾ�֣�������VC�е�OnPaint()
3.OPENGL���Ļ�ͼ����
glBegin(����);
glColor3f(...);
glVertex(...)
glColor3f(...);
glVertex(...);
...
glEnd();
���ɡ����͡�ָ����ʲôƽ�棺
GL_POINTS �������㼯
GL_LINES �����ߣ�2����һ����
GL_GL_POLYGON ��������������
GL_TRAINGLES ��������ͣ�3����һ�����
...�õ���˵�ɣ��Լ�������VC HELP INDEX�в��ң�
//////////////////////////////////////////////////////
//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);
//���ﲻ�ù�reshape()��ֻ��һ�����ڴ��ڸı��Сʱ�Ĵ���
//���ͼ�أ�����ὲ��
//������ص���display(),��ע���ͼ�ķ���
void myinit(void)
{
/*��ʼ����*/
auxInitDisplayMode(AUX_SINGLE|AUX_RGBA);
//������ʾ�������RGB����ɫ��ģʽ
auxInitPosition(0,0,500,500);
//��Сx=500 y=500 ��0��0������Ļ���ϵ�
auxInitWindow("sample1");
//���ڳ�ʼ���������DZ���
glClearColor(0.0,0.0,0.0,0.0);
//��������Ϊ��ɫ
glClear(GL_COLOR_BUFFER_BIT);
//����ɫ������ΪglClearColor���������õ���ɫ
//������ɫ
}
void CALLBACK reshape(GLsizei w,GLsizei h)
{
glViewport(0,0,w,h);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
if(w<=h)
glOrtho(-20.0,20.0,-20.0*(GLfloat)h/(GLfloat)w,
20.0*(GLfloat)h/(GLfloat)w,-50.0,50.0);
else
glOrtho(-20.0*(GLfloat)h/(GLfloat)w,
20.0*(GLfloat)h/(GLfloat)w,-20.0,20.0,-50.0,50.0);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
}
void CALLBACK display(void)
{
glBegin(GL_TRIANGLE_STRIP);//��������������
glColor3f(1.0,0.0,0.0);
glVertex3f(15.0,0.0,0.0);
glColor3f(0.0,1.0,0.0);
glVertex3f(-15.0,0.0,0.0);
glColor3f(0.0,0.0,1.0);
glVertex3f(0.0,15.0,15.0);
//��һ�����
glColor3f(0.0,1.0,1.0);
glVertex3f(10.0,15.0,-15.0);
//�ڶ������
glColor3f(1.0,1.0,0.0);
glVertex3f(15.0,0.0,0.0);
//��������
glEnd();
glFlush();
}
void main(void)
{
myinit();
auxReshapeFunc(reshape);
auxMainLoop(display);
}
//end of sample
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2��3��4��������2...
����һ������3�������ӵIJ�ɫ��ǣ������һ���������ɫƽ��
Χ�ɵĿ������...enjoy it
--
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BBSˮľ�廪վ�þ�����
�� ��Դ: �й�ƴ�BBSվ [bbs.ustc.edu.cn]
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