为什么 opengl 不想识别我的 3D 形状的颜色？
Why doesn't opengl want to recognize color for my 3d shapes?
我第一个机器人robot ();是平的，颜色也很完美。对于我的第二个机器人RobotBodyMotion();绕y轴旋转的那个不想识别我的颜色命令。我唯一能做的就是改变环境、漫反射和镜面。这会改变整个颜色，我想给每个形状单独上色。我可以改变或移动什么来为形状获得单独的颜色?
#include<Windows.h>
#include <GLglew.h>
#include <math.h>
#include <iostream>
#include <GLGL.h>
#include <GLGLU.h>
#include <GLUT/glut.h>
#include <glmglm.hpp>
#include <glmgtcmatrix_transform.hpp>
#include <glmgtxtransform.hpp>
#include "Canvas_freeglut.h"
#include<vector>
static int window;
static int menu_id;
static int submenu_id;
static int submenu_id2;
static int value = 0;
//part one
//robot alone with the missing features which is his body
//rotating hands and feet on off
//non flat shading model
//menu to toggle shading smooth or flat
static GLfloat theta[] = { 0.0, 0.0, 0.0 };
static GLint axis = 2.0;
void drawRectangle()
{
glutSolidCube(.15);
}
void drawSphere()
{
glutSolidSphere(.1, 16, 16);
}
void spinsphere()
{
theta[axis]+=.05;
if (theta[axis] > 360.0)
theta[axis] -= 360.0;
glutPostRedisplay();
////stop and reposition
//else
//{
// glutPostRedisplay();
//}
}
void drawRightSideAppendages()
{
glColor3f(1.000, 1.000, 0.000);
glPushMatrix(); // right arm
glTranslatef(0.139f, 0.12f, 0.0f);
glRotatef(150,0, 0, 1);
glScalef(0.35f, 1.20f, 0.1f);
drawSphere();
glPopMatrix();
glColor3f(0.000, 1.000, 0.000);
glPushMatrix(); // right hand
glTranslatef(0.22f, .25f, 0.0f);
glRotatef(theta[2], 0.0, 0.0, 1.0);
glScalef(0.44f, 0.50f, 0.50f);
drawSphere();
glPopMatrix();
glPushMatrix(); // right thigh
glColor3f(1.000, 0.000, 1.000);
glTranslatef(0.10f, -0.40f, 0.0f);
glRotatef(20, 0, 0, 1);
glScalef(0.40f, 1.40f, 0.35f);
drawSphere();
glPopMatrix();
glPushMatrix(); // right shin
glTranslatef(0.14f, -0.66f, 0.0f);
glScalef(0.35f, 1.60f, 0.35f);
drawSphere();
glPopMatrix();
glPushMatrix(); // right foot
glColor3f(0.000, 1.000, 0.000);
glTranslatef(0.16f, -.85f, 0.0f);
glRotatef(theta[2], 0.0, 0.0, 1.0);
glScalef(0.45f, 0.51f, 1.0f);
drawSphere();
glPopMatrix();
}
void drawRightSideAppendagesNoMotion()
{
glPushMatrix(); // right arm
glColor3f(1.000, 1.000, 0.000);
glTranslatef(0.139f, 0.12f, 0.0f);
glRotatef(150, 0, 0, 1);
glScalef(0.35f, 1.20f, .30f);
drawSphere();
glPopMatrix();
glPushMatrix(); // right hand
glColor3f(0.000, 1.000, 0.000);
glTranslatef(0.22f, .25f, 0.0f);
glScalef(0.44f, 0.50f, 0.50f);
drawSphere();
glPopMatrix();
glPushMatrix(); // right thigh
glColor3f(1.000, 0.000, 1.000);
glTranslatef(0.10f, -0.40f, 0.0f);
glRotatef(20, 0, 0, 1);
glScalef(0.40f, 1.40f, 0.35f);
drawSphere();
glPopMatrix();
glPushMatrix(); // right shin
glTranslatef(0.14f, -0.66f, 0.0f);
glScalef(0.35f, 1.60f, 0.35f);
drawSphere();
glPopMatrix();
glPushMatrix(); // right foot
glColor3f(0.000, 1.000, 0.000);
glTranslatef(0.16f, -.85f, 0.0f);
glScalef(0.45f, 0.51f, 1.0f);
drawSphere();
glPopMatrix();
}
void drawMiddleAppendages()
{
glPushMatrix();//antena
glColor3f(0.000, 0.000, 0.000);
glTranslatef(0.0f, 0.72f, 0.0f);
glScalef(0.1f, 0.75f, 0.1f);
drawRectangle();
glEnd;
glPopMatrix();
glPushMatrix(); // part of antena(circle)
glColor3f(1.000, 0.000, 0.000);
glTranslatef(0.0f, 0.79f, 0.0f);
glScalef(.30f, .30f, .30f);
drawSphere();
glPopMatrix();
glPushMatrix(); // head
glColor3f(0.000, 0.000, 1.000);
glTranslatef(0.0f, 0.50f, 0.0f);
glScalef(1.75f, 1.75f, 1.75f);
drawSphere();
glPopMatrix();
glPushMatrix(); // eyes (left)
glColor3f(0.627, 0.322, 0.176);
glTranslatef(-0.07f, 0.56f, -.11f);
glScalef(.35f,.35f, .35f);
drawSphere();
glPopMatrix();
glPushMatrix(); // eyes (right)
glColor3f(0.627, 0.322, 0.176);
glTranslatef(0.07f, 0.56f, -.11f);
glScalef(.35f, .35f, .35f);
drawSphere();
glPopMatrix();
glPushMatrix();//mouth
glColor3f(0.000, 0.000,.000);
glTranslatef(0.0f, 0.45f, -0.16f);
glRotatef(-10, 1, 0,0);
glScalef(1.0f, 0.20f, 0.20f);
drawRectangle();
glPopMatrix();
glPushMatrix(); // body
glColor3f(0.000, 0.000, 1.000);
glTranslatef(0.0f, 0.0f, 0.0f);
glScalef(.85f, 3.5f, .50f);
drawSphere();
glPopMatrix();
}
void drawLeftSideAppendages()
{
glPushMatrix(); // left arm
glColor3f(1.000, 1.000, 0.000);
glTranslatef(-0.139f, 0.12f, 0.0f);
glRotatef(-150, 0, 0, 1);
glScalef(0.35f, 1.20f, 0.1f);
drawSphere();
glPopMatrix();
glPushMatrix(); // left hand
glColor3f(0.000, 1.000, 0.000);
glTranslatef(-0.22f, .25f, 0.0f);
glRotatef(theta[2], 0.0, 0.0, 1.0);
glScalef(0.44f, 0.50f, 0.50f);
drawSphere();
glPopMatrix();
glPushMatrix(); // left thigh
glColor3f(1.000, 0.000, 1.000);
glTranslatef(-0.10f, -0.40f, 0.0f);
glRotatef(-20, 0, 0, 1);
glScalef(0.40f, 1.40f, 0.35f);
drawSphere();
glPopMatrix();
glPushMatrix(); // left shin
glTranslatef(-0.14f, -0.66f, 0.0f);
glScalef(0.35f, 1.60f, 0.35f);
drawSphere();
glPopMatrix();
glPushMatrix(); // left foot
glColor3f(0.000, 1.000, 0.000);
glTranslatef(-0.16f, -.85f, 0.0f);
glRotatef(theta[2], 0.0, 0.0, 1.0);
glScalef(0.45f, 0.51f, 1.0f);
drawSphere();
glPopMatrix();
}
void drawLeftSideAppendagesNoMotion()
{
glPushMatrix(); // left arm
glColor3f(1.000, 1.000, 0.000);
glTranslatef(-0.139f, 0.12f, 0.0f);
glRotatef(-150, 0, 0, 1);
glScalef(0.35f, 1.20f, 0.30f);
drawSphere();
glPopMatrix();
glPushMatrix(); // left hand
glColor3f(0.000, 1.000, 0.000);
glTranslatef(-0.22f, .25f, 0.0f);
glScalef(0.44f, 0.50f, 0.50f);
drawSphere();
glPopMatrix();
glPushMatrix(); // left thigh
glColor3f(1.000, 0.000, 1.000);
glTranslatef(-0.10f, -0.40f, 0.0f);
glRotatef(-20, 0, 0, 1);
glScalef(0.40f, 1.40f, 0.35f);
drawSphere();
glPopMatrix();
glPushMatrix(); // left shin
glTranslatef(-0.14f, -0.66f, 0.0f);
glScalef(0.35f, 1.60f, 0.35f);
drawSphere();
glPopMatrix();
glPushMatrix(); // left foot
glColor3f(0.000, 1.000, 0.000);
glTranslatef(-0.16f, -.85f, 0.0f);
glScalef(0.45f, 0.51f, 1.0f);
drawSphere();
glPopMatrix();
}
void Robot()
{
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
drawRightSideAppendages();
drawMiddleAppendages();
drawLeftSideAppendages();
}
void RobotNoMotion()
{
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
drawRightSideAppendagesNoMotion();
drawMiddleAppendages();
drawLeftSideAppendagesNoMotion();
}
void RobotBodyMotion()
{
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glRotatef(theta[2], 0.0, 1.0,0.0);
drawRightSideAppendagesNoMotion();
drawMiddleAppendages();
drawLeftSideAppendagesNoMotion();
}
void MyInit(void)
{
GLfloat mat_ambient[] = { 0.25, 0.25, 0.25, 1.0f };//shape ambience
GLfloat mat_diffuse[] = { .4 , .4, .4, 0.2775, 1.0f };//where light fades to shade
GLfloat mat_specular[] = { 1.0, 1.0, 1.0, 1.0f };//light reflect on shape specular
GLfloat mat_shininess[] = { 50.8f };//specular exponent
GLfloat light_position[] = { 1.0, 1.0, -1.0, 0.0 };
glMaterialfv(GL_FRONT, GL_AMBIENT, mat_ambient);
glMaterialfv(GL_FRONT, GL_DIFFUSE, mat_diffuse);
glMaterialfv(GL_FRONT, GL_SPECULAR, mat_specular);
glMaterialfv(GL_FRONT, GL_SHININESS, mat_shininess);
glLightfv(GL_LIGHT0, GL_POSITION, light_position);
glClearColor(0.663, 0.663, 0.663, 1.0);
glShadeModel(GL_SMOOTH);
glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0);
glEnable(GL_DEPTH_TEST);
glEnable(GL_NORMALIZE);
// set white background color
// set the drawing color (black)
glOrtho(-1, 1, -1, 1, -1, 1);
}
void Display()
{
if (value != 0 && value!=1)
{
spinsphere();
}
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
if (value == 1)
{
glClearColor(0.663, 0.663, 0.663, 0.0);//clear
}
else if (value == 2){
glDisable(GL_LIGHTING);
Robot();
}
else if (value == 3){
glDisable(GL_LIGHTING);
RobotNoMotion();
}
else if (value == 4){
glEnable(GL_LIGHTING);
RobotBodyMotion();
}
else if (value == 5){
glEnable(GL_LIGHTING);
RobotNoMotion();
}
glFlush();
}
void menu(int num)
{
if (num == 0)
{
glutDestroyWindow(window);
exit(0);
}
else
{
value = num;
}
glutPostRedisplay();
}
void createMenu(void)
{
submenu_id = glutCreateMenu(menu);
glutAddMenuEntry("Flat Rotation ON", 2);
glutAddMenuEntry("Flat Rotaion OFF",3);
submenu_id2 = glutCreateMenu(menu);
glutAddMenuEntry("Smooth Rotation ON", 4);
glutAddMenuEntry("Smooth Rotation OFF", 5);
menu_id = glutCreateMenu(menu);
glutAddMenuEntry("Clear", 1);
glutAddSubMenu("Flat Robot", submenu_id);
glutAddSubMenu("Smooth Robot", submenu_id2);
glutAddMenuEntry("Quit", 0);
glutAttachMenu(GLUT_RIGHT_BUTTON);
}
void main(int argc, char** argv)
{
glutInit(&argc, argv);// initialize the toolkit
glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB|GLUT_DEPTH); // set display mode
glutInitWindowSize(1000,500);// set window size
glutInitWindowPosition(0, 0);
window = glutCreateWindow("ROBOT");// open the screen window
MyInit();
createMenu();
glutDisplayFunc(Display);// register redraw function
glutMainLoop();// go into a perpetual loop
}
您在这里启用了照明:
glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0);
一旦你这样做了，你的几何颜色是由基于你的光和材料定义评估照明方程决定的。使用glColor3f()设置的颜色将不再使用。
你有两个选项来解决这个问题:
- 当前在代码中调用
glColor3f()的任何地方，您都可以调用修改材料属性。例如，每次你想改变材质的漫反射颜色时，调用glMaterialfv(GL_FRONT, GL_DIFFUSE, ...)。 初始化时，调用:
glColorMaterial(GL_FRONT, GL_DIFFUSE); glEnable(GL_COLOR_MATERIAL);这指定材料的漫射颜色跟踪
glColor3f()的当前颜色集。所以你可以在剩下的代码中使用glColor3f()来设置材质的漫反射颜色。
一个更好的选择是使用更现代的OpenGL版本，在那里你编写着色器，以你实现它的方式为所有东西着色，而不依赖于难以理解的状态值的组合。
相关文章：
- 无法将结构注册为增强几何体3D点
- 将"打开的CV图像"中的"颜色"转换为整数格式
- OpenGL大的3D纹理(>2GB）非常慢
- 如何在内核C++中使用1920x1080x16M图形或类似的16M颜色?(VGA）
- 如何在24位SDL_Surface上设置像素的颜色
- 是什么导致了Unity 3D中的"错误线程异常"？
- 如何从SDL_Surface获取特定像素的颜色
- 如何声明一个可以在整个程序中使用的全局 2d 3d 4d .. 数组(堆版本）变量?
- CPU 瓶颈;处理具有许多非静态对象的 3D 场景渲染的简单方法
- 如何使用Qt 3D库加载和显示搅拌机.obj源文件场景
- 列表视图更改选择颜色
- GtkTreeView 交替行颜色
- dx11 渲染到纹理仅显示透明颜色
- 使用 OpenGL 4.5 更改所选顶点的颜色
- 为什么我的 LEGACY OPENGL 颜色反转了?
- 如何从 3D 曲面网格中删除自相交三角形?
- CUDA 使用共享内存平铺 3D 卷积实现
- CGAL布尔以3D网格的颜色操作
- 深度+颜色的3D投影
- 为什么 opengl 不想识别我的 3D 形状的颜色？
