openGL如何给一个球体纹理贴图,并且当求转动的时候,纹理要随着球一起转动,要c++的详细代码,重谢!
答案:1 悬赏:60
解决时间 2021-02-12 14:28
- 提问者网友:黑米和小志
- 2021-02-12 10:48
openGL如何给一个球体纹理贴图,并且当求转动的时候,纹理要随着球一起转动,要c++的详细代码,重谢!
最佳答案
- 二级知识专家网友:酒安江南
- 2021-02-12 11:29
#include
#include
#include
#define stripeImageWidth 32
GLubyte stripeImage[4*stripeImageWidth];
#ifdef GL_VERSION_1_1
static GLuint texName;
#endif
void makeStripeImage(void)
{
int j;
for (j = 0; j < stripeImageWidth; j++) {
stripeImage[4*j] = (GLubyte) ((j<=4) ? 255 : 0);
stripeImage[4*j+1] = (GLubyte) ((j>4) ? 255 : 0);
stripeImage[4*j+2] = (GLubyte) 0;
stripeImage[4*j+3] = (GLubyte) 255;
}
}
static GLfloat xequalzero[] = {1.0, 0.0, 0.0, 0.0};
static GLfloat slanted[] = {1.0, 1.0, 1.0, 0.0};
static GLfloat *currentCoeff;
static GLenum currentPlane;
static GLint currentGenMode;
static float roangles;
void init(void)
{
glClearColor (0.0, 0.0, 0.0, 0.0);
glEnable(GL_DEPTH_TEST);
glShadeModel(GL_SMOOTH);
makeStripeImage();
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
#ifdef GL_VERSION_1_1
glGenTextures(1, &texName);
glBindTexture(GL_TEXTURE_1D, texName);
#endif
glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
#ifdef GL_VERSION_1_1
glTexImage1D(GL_TEXTURE_1D, 0, GL_RGBA, stripeImageWidth, 0,
GL_RGBA, GL_UNSIGNED_BYTE, stripeImage);
#else
glTexImage1D(GL_TEXTURE_1D, 0, 4, stripeImageWidth, 0,
GL_RGBA, GL_UNSIGNED_BYTE, stripeImage);
#endif
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
currentCoeff = xequalzero;
currentGenMode = GL_OBJECT_LINEAR;
currentPlane = GL_OBJECT_PLANE;
glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, currentGenMode);
glTexGenfv(GL_S, currentPlane, currentCoeff);
glEnable(GL_TEXTURE_GEN_S);
glEnable(GL_TEXTURE_1D);
//glEnable(GL_CULL_FACE);
glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0);
glEnable(GL_AUTO_NORMAL);
glEnable(GL_NORMALIZE);
glFrontFace(GL_CW);
//glCullFace(GL_BACK);
glMaterialf (GL_FRONT, GL_SHININESS, 64.0);
roangles = 45.0f;
}
void display(void)
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glPushMatrix ();
glRotatef(roangles, 0.0, 0.0, 1.0);
#ifdef GL_VERSION_1_1
glBindTexture(GL_TEXTURE_1D, texName);
#endif
//glutSolidTeapot(2.0);
glutSolidSphere( 2.0, 32, 32 );
glPopMatrix ();
glFlush();
}
void reshape(int w, int h)
{
glViewport(0, 0, (GLsizei) w, (GLsizei) h);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
if (w <= h)
glOrtho (-3.5, 3.5, -3.5*(GLfloat)h/(GLfloat)w,
3.5*(GLfloat)h/(GLfloat)w, -3.5, 3.5);
else
glOrtho (-3.5*(GLfloat)w/(GLfloat)h,
3.5*(GLfloat)w/(GLfloat)h, -3.5, 3.5, -3.5, 3.5);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
}
void idle()
{
roangles += 0.1f;
glutPostRedisplay();
}
int main(int argc, char** argv)
{
glutInit(&argc, argv);
glutInitDisplayMode (GLUT_SINGLE | GLUT_RGB | GLUT_DEPTH);
glutInitWindowSize(256, 256);
glutInitWindowPosition(100, 100);
glutCreateWindow (argv[0]);
glutIdleFunc( idle );
init ();
glutDisplayFunc(display);
glutReshapeFunc(reshape);
glutMainLoop();
return 0;
}这是OpenGL红宝书的例子,稍作改动,以显示球体转动时纹理是跟着动地。还有原来例子画的是Teapot.。。。
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