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我目前的OpenGL应用程序只是一个球体和一层,照明和阴影正常工作。OpenGL纹理映射禁用底纹
通过红皮书教程加入了2D纹理的地板后:http://fly.cc.fer.hr/~unreal/theredbook/chapter09.html
..我的阴影被禁用。如果我禁用GL_TEXTURE_2D,一切都呈现正确,但纹理显然不显示。这是一个已知问题与已知的解决方法?这里是一个位的代码以供参考:
#define checkImageWidth 64
#define checkImageHeight 64
GLubyte checkImage[checkImageWidth][checkImageHeight][3];
void makeCheckImage(void)
{
int i, j, c;
for (i = 0; i < checkImageWidth; i++) {
for (j = 0; j < checkImageHeight; j++) {
c = ((((i&0x8)==0)^(((j&0x8))==0)))*255;
checkImage[i][j][0] = (GLubyte) c;
checkImage[i][j][1] = (GLubyte) c;
checkImage[i][j][2] = (GLubyte) c;
}
}
}
void initImage() {
makeCheckImage();
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
glTexImage2D(GL_TEXTURE_2D, 0, 3, checkImageWidth,
checkImageHeight, 0, GL_RGB, GL_UNSIGNED_BYTE,
&checkImage[0][0][0]);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER,
GL_NEAREST);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
GL_NEAREST);
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL);
}
然后粗糙的地面绘制函数:
void makeGround() {
GLfloat mat_specular[] = { 0.5, 0.5, 0.5, 0.5 };
GLfloat mat_diffuse[] = { 0.3, 0.3, 0.3, 0.3 };
GLfloat mat_shininess[] = { 25.0 };
glMaterialfv(GL_FRONT, GL_SPECULAR, mat_specular);
glMaterialfv(GL_FRONT, GL_DIFFUSE, mat_diffuse);
glMaterialfv(GL_FRONT, GL_SHININESS, mat_shininess);
glColor3f(0.2, 0.2, 0.2);
glBegin(GL_QUADS);
glTexCoord2f(0.0, 0.0); glVertex3f(-100.0f, -1.0f, -100.0f);
glTexCoord2f(0.0, 1.0); glVertex3f(-100.0f, -1.0f, 100.0f);
glTexCoord2f(1.0, 1.0); glVertex3f(100.0f, -1.0f, 100.0f);
glTexCoord2f(1.0, 0.0); glVertex3f(100.0f, -1.0f, -100.0f);
glEnd();
glFlush();
}
,如果你需要查看代码的任何其他部分,只是让我知道
Spot on。谢谢! – grep