opengl如何绘制一个三维平面

Question

如题所述

Answer 1

你好，下面是opengl绘制三维图像的代码。
#include "stdafx.h"
#include<GL/freeglut.h>
#include<GLFW/glfw3.h>
// 绘图棱锥
void display()
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// 三维图形由三维空间中的三角形拼接而成
glBegin(GL_TRIANGLES);
// 指定棱锥的四个顶点
GLfloat vertex[4][3] = {
{0, 0, 0.5},
{0.2, 0.2, 0},
{-0.3, 0, 0},
{0, -0.3, 0}
};
// 绘制三角形
glColor3f(0.5, 0.5, 0.9);
for (int i = 0; i < 2; i++) {
for (int j = i + 1; j < 3; j++) {
for (int k = j + 1; k < 4; k++) {
glVertex3fv(vertex[i]);
glVertex3fv(vertex[j]);
glVertex3fv(vertex[k]);
}
}
}
glEnd();
// 绘制顶点连线
glBegin(GL_LINES);
glColor3f(1, 0, 0);
for (int i = 0; i < 3; i++)
{
for (int j = i + 1; j < 4; j++) {
glVertex3fv(vertex[i]);
glVertex3fv(vertex[j]);
}
}
glEnd();
glFlush();
}
int main()
{
glfwInit();
GLFWwindow* window = glfwCreateWindow(400, 400, "hello, glfw", NULL, NULL);
glfwMakeContextCurrent(window);
glfwSwapInterval(10);
while (glfwWindowShouldClose(window) == GL_FALSE)
{
// 绘制棱锥
display();
glfwSwapBuffers(window);
glfwPollEvents();
}
glfwDestroyWindow(window);
glfwTerminate();
return 0;
}