VC++贴图

Question

用vc++在地面上贴了一个图（黄褐色），但是却严重影响了原本画图的效果，尤其是白色灯光下的白色物体，请问如何改善？

Answer 1

把贴图图像的Alpha通道值降低一些试试

Answer 2

void SetupRC(void)
    {
     // Lighting values
    GLbyte *pBytes;
    GLint iWidth, iHeight, iComponents;
    GLenum eFormat;
    GLint iLoop;    GLfloat ambientProperties[] = {0.7, 0.7, 0.7, 1.0};
    GLfloat diffuseProperties[] = {0.8, 0.8, 0.8, 1.0};
    GLfloat specularProperties[] = {1.0, 1.0, 1.0, 1.0}; // Light values and coordinates
     glClearDepth(1.0);
glEnable(GL_DEPTH_TEST); // Hidden surface removal
glFrontFace(GL_CCW); // Counter clock-wise polygons face out
glEnable(GL_CULL_FACE); // Do not calculate insides // Enable lighting
glEnable(GL_LIGHTING); // Setup and enable light 0
glLightfv(GL_LIGHT0, GL_AMBIENT, ambientProperties);
     glLightfv(GL_LIGHT0, GL_DIFFUSE, diffuseProperties);
     glLightfv(GL_LIGHT0, GL_SPECULAR, specularProperties);
     glLightModelf(GL_LIGHT_MODEL_TWO_SIDE, 1.0);
     
glEnable(GL_LIGHT0);
     
// Load textures
glEnable(GL_TEXTURE_2D);
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
     glGenTextures(TEXTURE_COUNT, textures);
     for(iLoop = 0; iLoop < TEXTURE_COUNT; iLoop++)
        {
        // Bind to next texture object
        glBindTexture(GL_TEXTURE_2D, textures[iLoop]);        // Load texture, set filter and wrap modes
        pBytes = gltLoadTGA(szTextureFiles[iLoop],&iWidth, &iHeight, &iComponents, &eFormat);
        gluBuild2DMipmaps(GL_TEXTURE_2D, iComponents, iWidth, iHeight, eFormat, GL_UNSIGNED_BYTE, pBytes);
        free(pBytes);    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S,  GL_REPEAT);
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T,  GL_REPEAT);
        
        // Don't need original texture data any more
   } glShadeModel(GL_SMOOTH);
glClearColor(0.81f, 0.83f, 0.90f, 1.0f );

    }
以上是环境设置，下面是调用过程。能说的具体点吗
glDisable(GL_LIGHTING);
  glBegin(GL_QUADS);
//glColor3f(0.8+colorAdd,0.8+colorAdd,0.75+colorAdd);
glBindTexture(GL_TEXTURE_2D, textures[TEXTURE_FLOOR]);
glTexCoord2f(0.0f, 0.0f);
          glVertex3f(-400.0f, -80.0f, 80.0f); glTexCoord2f(1.0f, 0.0f);
glVertex3f(400.0f, -80.0f, 80.0f); glTexCoord2f(1.0f, 1.0f);
glVertex3f(400.0f, -80.0f, -300.0f); glTexCoord2f(0.0f, 1.0f);
glVertex3f(-400.0f, -80.0f, -300.0f);
  glEnd();

Answer 3

我好像和你不一样，我只是在做OpenGL的作业。你的好像是遥感应用吧，不太懂