过多的镜面光opengl

Posted 2023-02-16

【中文标题】过多的镜面光opengl

【英文标题】：too much specular light opengl

【发布时间】：2014-04-06 11:37:38

【问题描述】：

这些是我的漫反射、环境和镜面反射设置以及我的灯光位置。我的场景在镜面光下看起来非常明亮。我试过调整灯光的位置，但没有任何效果。 GLfloat greenDiffuseMaterial[] = 0.0, 1.0, 0.0,1.0; GLfloat whiteSpecularMaterial[] = 1.0, 1.0, 1.0,1.0; GLfloat greenAmbientMaterial[] = 0.0, 1.0, 0.2,1.0;

GLfloat greenEmissiveMaterial[] = 0.0, 1.0, 0.5,1.0;
GLfloat lightPosition[] =  0.0,1.0,0.0, 0.0;
GLfloat ambientLight[]  =  0.0, 0.0, 0.0, 1.0 ;
GLfloat diffuseLight[]  =  1.0, 1.0, 1.0, 1.0 ;
GLfloat specularLight[] =  1.0, 1.0, 1.0, 1.0 ;

编辑 1

 for (int g =0;g<6400;g++)
    glBegin(GL_QUADS);
        if(mountText %2 ==0)glTexCoord2f(islandVert[g][0] /xscale,islandVert[g][2] / zscale);
        else
                glEnable(GL_NORMALIZE);
        glDisable(GL_TEXTURE_2D);
        glShadeModel(GL_SMOOTH);
        glEnable(GL_COLOR_MATERIAL);
        glEnable(GL_DEPTH_TEST);
                        glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT, greenAmbientMaterial);
                        glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, greenDiffuseMaterial);
                        glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, whiteSpecularMaterial);
                        glMaterialfv(GL_FRONT_AND_BACK, GL_SHININESS, mShininess);
                            glColorMaterial(GL_FRONT_AND_BACK, GL_DIFFUSE);
                            glColorMaterial(GL_FRONT_AND_BACK, GL_AMBIENT);
                        glColorMaterial(GL_FRONT_AND_BACK, GL_SPECULAR);
                    glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
        glNormal3f(vertNorm[g][0],vertNorm[g][1],vertNorm[g][2]);

        glVertex3f(islandVert[g][0],islandVert[g][1],islandVert[g][2]);
        g++;
        if(mountText %2 ==0)glTexCoord2f(islandVert[g][0] / xscale, islandVert[g][2] / zscale);
        else
            glEnable(GL_NORMALIZE);
        glDisable(GL_TEXTURE_2D);
        glShadeModel(GL_SMOOTH);
        glEnable(GL_COLOR_MATERIAL);
        glEnable(GL_DEPTH_TEST);
        glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, whiteSpecularMaterial);
                        glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT, greenAmbientMaterial);
                        glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, greenDiffuseMaterial);
                        glMaterialfv(GL_FRONT_AND_BACK, GL_SHININESS, mShininess);
                            glColorMaterial(GL_FRONT_AND_BACK, GL_DIFFUSE);
                            glColorMaterial(GL_FRONT_AND_BACK, GL_AMBIENT);
                            glColorMaterial(GL_FRONT_AND_BACK, GL_SPECULAR);
                    glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
        glNormal3f(vertNorm[g][0],vertNorm[g][1],vertNorm[g][2]);
        glVertex3f(islandVert[g][0],islandVert[g][1],islandVert[g][2]);
        g++;

        if(mountText %2 ==0)glTexCoord2f(islandVert[g][0] / xscale, islandVert[g][2] / zscale);
        else
                glEnable(GL_NORMALIZE);
        glDisable(GL_TEXTURE_2D);
        glShadeModel(GL_SMOOTH);
        glEnable(GL_COLOR_MATERIAL);
        glEnable(GL_DEPTH_TEST);
                        glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT, greenAmbientMaterial);
                        glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, greenDiffuseMaterial);
                        glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, whiteSpecularMaterial);
                        glMaterialfv(GL_FRONT_AND_BACK, GL_SHININESS, mShininess);
                            glColorMaterial(GL_FRONT_AND_BACK, GL_DIFFUSE);
                            glColorMaterial(GL_FRONT_AND_BACK, GL_AMBIENT);
                            glColorMaterial(GL_FRONT_AND_BACK, GL_SPECULAR);            
                            glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
        glNormal3f(vertNorm[g][0],vertNorm[g][1],vertNorm[g][2]);
        glVertex3f(islandVert[g][0],islandVert[g][1],islandVert[g][2]);

        g++;

        if(mountText %2 ==0)glTexCoord2f(islandVert[g][0] / xscale, islandVert[g][2] / zscale);
        else
                glEnable(GL_NORMALIZE);
        glDisable(GL_TEXTURE_2D);
        glShadeModel(GL_SMOOTH);
        glEnable(GL_COLOR_MATERIAL);
        glEnable(GL_DEPTH_TEST);
                        glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT, greenAmbientMaterial);
                        glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, greenDiffuseMaterial);
                        glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, whiteSpecularMaterial);
                        glMaterialfv(GL_FRONT_AND_BACK, GL_SHININESS, mShininess);
                            glColorMaterial(GL_FRONT_AND_BACK, GL_DIFFUSE);
                            glColorMaterial(GL_FRONT_AND_BACK, GL_AMBIENT);
                            glColorMaterial(GL_FRONT_AND_BACK, GL_SPECULAR);
                    glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
        glNormal3f(vertNorm[g][0],vertNorm[g][1],vertNorm[g][2]);
        glVertex3f(islandVert[g][0],islandVert[g][1],islandVert[g][2]);
    glEnd();

基本上在每个坐标上，我都会检查纹理是否打开，如果不是，我想将其设置为原始绿色材质。我得到的结果是我的对象的一侧被极度照亮，而另一侧则是环境。顶点法线起作用是因为有平滑的阴影，但我认为这可能与我的灯光的位置有关。当我尝试改变它时，场景保持不变。

【参考方案1】：

仅此部分

GLfloat greenEmissiveMaterial[] = 0.0, 1.0, 0.5,1.0;

将使任何对象以颜色 (0, 1, 0.5) 显示，与您指定的任何光源无关。真正的光照只会添加该颜色，使其更加明亮。

【讨论】：

我忘了说我还有其他材质 setGLfloat greenDiffuseMaterial[] = 0.0, 1.0, 0.0,1.0; GLfloat whiteSpecularMaterial[] = 1.0, 1.0, 1.0,1.0; GLfloat greenAmbientMaterial[] = 0.0, 1.0, 0.2,1.0;

请提供代码中显示您遇到的问题的相关部分。