使用OpenGL进行三维地形动态显示程序设计的代码，目的要求:(1) 地形高程的随机生成(2) 地形平滑技术

好的，以下是使用OpenGL进行三维地形动态显示程序设计的代码，实现地形高程的随机生成和平滑技术：

注意：以下代码仅供参考，可能需要针对您的具体应用做出修改。

#include <iostream>
#include <vector>
#include <random>
#include <cmath>

// OpenGL头文件
#include <GL/glut.h>

// 地形网格的长宽
#define GRID_SIZE 100

// 地形高度图存储数组
std::vector<std::vector<float>> terrain(GRID_SIZE, std::vector<float>(GRID_SIZE));

// 随机数引擎
std::default_random_engine generator;

// 均值滤波
float smooth(std::vector<std::vector<float>> &src, int x, int y, int size) {
    float sum = 0.0f;
    int count = 0;
    for (int i = x - size; i <= x + size; i++) {
        for (int j = y - size; j <= y + size; j++) {
            if (i >= 0 && i < GRID_SIZE && j >= 0 && j < GRID_SIZE) {
                sum += src[i][j];
                count++;
            }
        }
    }
    return sum / count;
}

// Diamond-Square算法生成高程图
void diamondSquare(int left, int top, int right, int bottom, float range) {
    if (left == right || top == bottom) {
        return;
    }
    int centerX = (left + right) / 2;
    int centerY = (top + bottom) / 2;
    float randValue = std::uniform_real_distribution<float>(-range, range)(generator);

    terrain[centerX][centerY] = (terrain[left][top] + terrain[left][bottom] + terrain[right][top] + terrain[right][bottom]) / 4.0f + randValue;

    diamondSquare(left, top, centerX, centerY, range / 2.0f);
    diamondSquare(centerX, top, right, centerY, range / 2.0f);
    diamondSquare(left, centerY, centerX, bottom, range / 2.0f);
    diamondSquare(centerX, centerY, right, bottom, range / 2.0f);
}

// 地形高度图生成函数
void generateTerrain() {
    // 生成四个角的高程值
    terrain[0][0] = std::uniform_real_distribution<float>(-1.0f, 1.0f)(generator);
    terrain[0][GRID_SIZE - 1] = std::uniform_real_distribution<float>(-1.0f, 1.0f)(generator);
    terrain[GRID_SIZE - 1][0] = std::uniform_real_distribution<float>(-1.0f, 1.0f)(generator);
    terrain[GRID_SIZE - 1][GRID_SIZE - 1] = std::uniform_real_distribution<float>(-1.0f, 1.0f)(generator);

    float range = 1.0f;
    while (range > 0.1f) {
        diamondSquare(0, 0, GRID_SIZE - 1, GRID_SIZE - 1, range);
        range /= 2.0f;
    }

    // 均值滤波
    for (int i = 0; i < GRID_SIZE; i++) {
        for (int j = 0; j < GRID_SIZE; j++) {
            terrain[i][j] = smooth(terrain, i, j, 1);
        }
    }
}

// 显示回调函数
void display() {
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glMatrixMode(GL_MODELVIEW);
    glLoadIdentity();

    // 视角位置
    gluLookAt(0.0, 0.0, 5.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0);

    // 绘制地形
    glBegin(GL_TRIANGLES);
    for (int i = 0; i < GRID_SIZE - 1; i++) {
        for (int j = 0; j < GRID_SIZE - 1; j++) {
            // 顶点1
            glColor3f((terrain[i][j] + 1.0f) / 2.0f, (terrain[i][j] + 1.0f) / 2.0f, (terrain[i][j] + 1.0f) / 2.0f);
            glVertex3f(i, terrain[i][j], j);

            // 顶点2
            glColor3f((terrain[i+1][j] + 1.0f) / 2.0f, (terrain[i+1][j] + 1.0f) / 2.0f, (terrain[i+1][j] + 1.0f) / 2.0f);
            glVertex3f(i+1, terrain[i+1][j], j);

            // 顶点3
            glColor3f((terrain[i][j+1] + 1.0f) / 2.0f, (terrain[i][j+1] + 1.0f) / 2.0f, (terrain[i][j+1] + 1.0f) / 2.0f);
            glVertex3f(i, terrain[i][j+1], j+1);

            // 顶点2
            glColor3f((terrain[i+1][j] + 1.0f) / 2.0f, (terrain[i+1][j] + 1.0f) / 2.0f, (terrain[i+1][j] + 1.0f) / 2.0f);
            glVertex3f(i+1, terrain[i+1][j], j);

            // 顶点3
            glColor3f((terrain[i][j+1] + 1.0f) / 2.0f, (terrain[i][j+1] + 1.0f) / 2.0f, (terrain[i][j+1] + 1.0f) / 2.0f);
            glVertex3f(i, terrain[i][j+1], j+1);

            // 顶点4
            glColor3f((terrain[i+1][j+1] + 1.0f) / 2.0f, (terrain[i+1][j+1] + 1.0f) / 2.0f, (terrain[i+1][j+1] + 1.0f) / 2.0f);
            glVertex3f(i+1, terrain[i+1][j+1], j+1);
        }
    }
    glEnd();

    glutSwapBuffers();
}

// 窗口大小改变回调函数
void reshape(int width, int height) {
    glViewport(0, 0, width, height);

    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    gluPerspective(60.0, (GLfloat)width / (GLfloat)height, 1.0, 100.0);
}

// 主函数
int main(int argc, char **argv) {
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_RGBA | GLUT_DOUBLE | GLUT_DEPTH);
    glutInitWindowSize(800, 600);
    glutCreateWindow("Terrain");

    generateTerrain();

    glutDisplayFunc(display);
    glutReshapeFunc(reshape);

    glEnable(GL_DEPTH_TEST);

    glutMainLoop();

    return 0;
}

以上代码使用Diamond-Square算法生成地形高程图，并使用均值滤波进行平滑处理。同时使用OpenGL绘制地形。颜色映射可以通过调整glColor3f函数中的参数来实现。