计算机图形学 opengl 文字显示

#include

#include

#include

#pragma comment(linker, "/subsystem:console")

using namespace std;

void myReshape(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 drawCNString(const char* str)

{

int len=0, i;

wchar_t* wstring;

HDC hDC = wglGetCurrentDC();

GLuint list = glGenLists(1);

for(i=0; str[i]!='\0'; ++i)

{

if( IsDBCSLeadByte(str[i]) )

++i;

++len;

}

wstring = (wchar_t*)malloc((len+1) * sizeof(wchar_t));

MultiByteToWideChar(CP_ACP, MB_PRECOMPOSED, str, -1, wstring, len);

wstring[len] = L'\0';

for(i=0; i

{

wglUseFontBitmapsW(hDC, wstring[i], 1, list);

glCallList(list);

}

free(wstring);

glDeleteLists(list, 1);

}

void display(void)

{

glClear(GL_COLOR_BUFFER_BIT);

glColor3f(1.0f, 0.0f, 0.0f);

glRasterPos2f(-0.5f, -0.6f);

drawCNString(" ");

glutSwapBuffers();

}

int main(int argc, char** argv)

{

cout<<" "<

glutInit(&argc, argv);

glutInitDisplayMode (GLUT_SINGLE | GLUT_RGB); glutInitWindowSize (500, 500); glutInitWindowPosition (0, 0); glutCreateWindow ("显示信息");

glClearColor(0.0,0.0,0.0,0.0);

glClear(GL_COLOR_BUFFER_BIT); glutReshapeFunc(myReshape);

glutDisplayFunc(display);

glutMainLoop();

return 0;

}