在vmware中实现mesa3d的一个例子
发现vmware linux中可以运行mesa3d，而且，效果不错，这样我在家也可以调试程序了。现在决定好好看看redbook 这本书，仔细熟悉ogl每个函数的用法，通过熟悉这个，理解mesa的原理。发现mesa-6.5.2的版本刚好实现的是ogl1.5版本，根ogles1.x版本一致。
下面贴出一个triangle的程序和makefile，希望对大家有用。
#include <GL/glut.h>
#include <stdlib.h>
#include <stdio.h>
#include <math.h>
int bDepth, bOutLine, bCull;
GLfloat xRot,yRot;
#define GL_PI 3.1415f
void RenderScene(void)
{
GLfloat x,y,angle;
int iPivot = 1;
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
if(bCull)
glEnable(GL_CULL_FACE);
else
glDisable(GL_CULL_FACE);
if(bDepth)
glEnable (GL_DEPTH_TEST);
else
glDisable(GL_DEPTH_TEST);
if(bOutLine)
glPolygonMode(GL_BACK,GL_LINE);
else
glPolygonMode(GL_BACK,GL_FILL);
glPushMatrix();
glRotatef(xRot,1.0f,0.0f,0.0f);
glRotatef(yRot,0.0f,1.0f,0.0f);
glBegin(GL_TRIANGLE_FAN);
glVertex3f(0.0f, 0.0f,75.0f);
for(angle=0.0f; angle<(2.0f*GL_PI); angle+=(GL_PI/8.0f))
{
x = 50.0f * sin(angle);
y = 50.0f * cos(angle);
if ((iPivot % 2)==0)
glColor3f (0.0f, 1.0f,0.0f);
else
glColor3f(1.0f, 0.0f, 0.0f);
iPivot ++;
glVertex2f(x,y);
}
glEnd();
glBegin(GL_TRIANGLE_FAN);
glVertex3f(0.0f, 0.0f,0.0f);
for(angle=0.0f; angle<(2.0f*GL_PI); angle+=(GL_PI/8.0f))
{
x = 50.0f * sin(angle);
y = 50.0f * cos(angle);
if ((iPivot % 2)==0)
glColor3f (0.0f, 1.0f,0.0f);
else
glColor3f(1.0f, 0.0f, 0.0f);
iPivot ++;
glVertex2f(x,y);
}
glEnd();
glPopMatrix();
glFlush();
}
void SetupRC(void)
{
glClearColor(0.0f,0.0f,0.0f,1.0f);
glColor3f(0.0f,1.0f,0.0f);
glShadeModel(GL_FLAT);
glFrontFace(GL_CW);
}
void ChangeSize(GLsizei w, GLsizei h)
{
GLfloat aspectRatio;
if(h==0)
h=1;
glViewport(0,0,w,h);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
aspectRatio = (GLfloat) w / (GLfloat) h;
if(w<=h)
glOrtho (-100.0, 100.0,
-100.0/aspectRatio,100.0/aspectRatio,
-100.0, 100.0);
else
glOrtho (-100.0 * aspectRatio, 100.0 * aspectRatio,
-100.0 , 100.0,
-100.0 , 100.0);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
}
static void
key(unsigned char k, int x, int y)
{
switch (k) {
case 27: /* Escape */
exit(0);
break;
case ‘c’:
bCull = bCull ? 0 : 1;
break;
case ‘d’:
bDepth = bDepth ? 0 : 1;
break;
case ‘l’:
bOutLine = bOutLine ? 0: 1;
break;
case ‘a’:
xRot = xRot + 10.0;
break;
case ’s’:
yRot = yRot + 10.0;
break;
default:
return;
}
glutPostRedisplay();
}
void main(void)
{
bCull=1;
bDepth = 1;
bOutLine = 1;
xRot = 0.0;
yRot = 0.0;
glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB);
glutCreateWindow(”Simple”);
glutDisplayFunc(RenderScene);
glutReshapeFunc(ChangeSize);
SetupRC();
glutKeyboardFunc(key);
glutMainLoop();
}
makefile:
CC = gcc
XX = g++
CFLAGS = -Wall -O -g
TARGET = ./triangle
LIB_DIR = -L /usr/lib
INC_DIR = -I /usr/include/GL
LIB = -lglut -lm
%.o: %.c
$(CC) $(CFLAGS) $(INC_DIR) $(LIB_DIR) -c $< -o $@ $(LIB)
%.o:%.cpp
$(XX) $(CFLAGS) $(INC_DIR) $(LIB_DIR) -c $< -o $@ $(LIB)
SOURCES = $(wildcard *.c *.cpp)
OBJS = $(patsubst %.c,%.o,$(patsubst %.cpp,%.o,$(SOURCES)))
$(TARGET) : $(OBJS)
$(XX) $(INC_DIR) $(LIB_DIR) $(OBJS) -o $(TARGET) $(LIB)
chmod a+x $(TARGET)
clean:
rm *.o $(TARGET)
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