文章目录

  • 专栏导读
  • 文章导读
    • 一、easyX图形库基本介绍?
    • 1、easyX的原理:
    • 2、easyX的安装
    • 3D Heat源码描述
  • 3D Heat效果展示
  • 总结

专栏导读

作者简介:M malloc,致力于成为嵌入式大牛的男人
专栏简介:本文收录于 初阶数据结构,本专栏主要内容讲述了初阶的数据结构,如顺序表,链表,栈,队列等等,专为小白打造的文章专栏。
相关专栏推荐:LeetCode刷题集,C语言每日一题。


文章导读

本章我将详细的讲解如何通过easyx.h实现3D Heat的知识点

一、easyX图形库基本介绍?

1、easyX的原理:

基于Windows图形编程,将Windows下的复杂程序过程进行封装,仅给用户提供一个简单熟悉的接口。用户对于图形库中函数的调用,最终都会由Windows底层的API实现。

2、easyX的安装

注意:easyX图形库仅支持VS的各个版本
在浏览器搜索easyX官网,进入官网后,点击下载


安装好就行啦!!!

3D Heat源码描述

#define _CRT_SECURE_NO_WARNINGS 1#include #define _USE_MATH_DEFINES#include #include using namespace std;// 宏定义屏幕宽度和高度#define SCREEN_WIDTH 640#define SCREEN_HEIGHT 480// 点 结构体struct Point{int x = 0;int y = 0;};// 粒子 结构体// width、height 分别定义了粒子的宽和高// x、y 表示粒子的三维坐标(z 坐标永为 0)// color 表示该粒子的颜色struct Atom{static const int width = 2;static const int height = 4;int x = 0;int y = 0;COLORREF color;};// 全局变量定义vector<Atom> _atomGroup;// 粒子群vector<Atom> _wordGroup;// 文字粒子群double _angle_x = 0;// 绕 x 轴旋转角度double _angle_y = 0;// 绕 y 轴旋转角度ExMessage _lastMsg;// 记录上次绘图时的鼠标消息ExMessage _nowMsg;// 记录当前鼠标消息// 函数声明void InitQuietHeart();// 创建静止的心形粒子群(已弃用,但仍保留)void BeatHeart();// 创建跳动的心脏,每运行一次该函数,心跳一帧void InitBlessingWord();// 创建祝福文字粒子群void Rotate();// 计算旋转角度void Draw();// 绘制三维投影Point GetConvertPoint(int x, int y);// 将三维坐标转化为投影后的绘图物理坐标int main(){initgraph(SCREEN_WIDTH, SCREEN_HEIGHT);// 初始化窗口setorigin(SCREEN_WIDTH / 2, SCREEN_HEIGHT / 2);// 设置原点为屏幕中心SetWindowText(GetHWnd(), _T("致你的七夕礼物 —— 3D Heart"));// 设置窗口标题BeatHeart();// 创建跳动的心脏InitBlessingWord();// 创建文字Draw();// 进行一次绘图bool beating = true;// 控制心跳的变量while (true)// 进入主循环{ExMessage msg;while (peekmessage(&msg, EX_MOUSE))// 检测有无鼠标消息{// 按下鼠标左键时,记录鼠标位置if (msg.message == WM_LBUTTONDOWN){_lastMsg = msg;}// 鼠标左键按下,且鼠标正在移动时,进行旋转if (msg.lbutton && msg.message == WM_MOUSEMOVE){beating = false;// 旋转图形时,停止心跳_nowMsg = msg;// 获取当前鼠标位置Rotate();// 通过对比上一次绘图时的鼠标位置,进行旋转_lastMsg = _nowMsg;// 记录下这一次的鼠标位置Draw();// 进行一次绘图circle(0, 0, 2);// 画出坐标原点}else if (msg.rbutton){beating = false;// 鼠标右键按下时,停止心跳}else{beating = true;// 其他情况继续心跳}}// 心脏跳动if (beating){BeatHeart();Draw();}// 延时Sleep(16);}// 关闭绘图环境closegraph();return 0;}// 计算心形时的辅助函数float f(float x, float y, float z){float a = x * x + 9.0f / 4.0f * y * y + z * z - 1;return a * a * a - x * x * z * z * z - 9.0f / 80.0f * y * y * z * z * z;}// 计算心形时的辅助函数float h(float x, float z){for (float y = 1.0f; y >= 0.0f; y -= 0.001f){if (f(x, y, z) <= 0.0f){return y;}}return 0.0f;}void InitQuietHeart(){// 添加心形粒子群int _x = 0;int _y = -30;for (float z = 1.5f; z > -1.5f; z -= 0.05f){_x = -60;for (float x = -1.5f; x < 1.5f; x += 0.025f){float v = f(x, 0.0f, z);if (v <= 0.0f){// 创建粒子Atom a;// 设置粒子坐标a.x = _x;a.y = _y;// 计算该位置颜色float y0 = h(x, z);float ny = 0.01f;float nx = h(x + ny, z) - y0;float nz = h(x, z + ny) - y0;float nd = 1.0f / sqrtf(nx * nx + ny * ny + nz * nz);float d = (nx + ny - nz) * nd * 0.5f + 0.5f;switch ((int)(d * 5.0f)){case 0: a.color = 0x111133; break;case 1: a.color = 0x111144; break;case 2: a.color = 0x111155; break;case 3: a.color = 0x111177; break;case 4: a.color = 0x111199; break;case 5: a.color = 0x1111aa; break;case 6: a.color = 0x2222cc; break;case 7: a.color = 0x2222ee; break;case 8: a.color = 0x3333ff; break;}_atomGroup.push_back(a);}_x++;}_y++;}}void BeatHeart(){// 时间变量 tstatic float t = 0.0f;t += (t > 100) " />-100 : 0.1f;// 一系列复杂运算...float s = sinf(t);float a = s * s * s * s * 0.2f;// 清空粒子群_atomGroup.clear();// 添加粒子群int _x = 0;int _y = -20;for (float z = 1.3f; z > -1.2f; z -= 0.05f){float tz = z * (1.2f - a);_x = -60;for (float x = -1.5f; x < 1.5f; x += 0.025f){float tx = x * (1.2f + a);float v = f(tx, 0.0f, tz);if (v <= 0.0f){// 创建粒子Atom atom;// 设置粒子坐标atom.x = _x;atom.y = _y;// 设置粒子颜色// 一系列复杂运算...float y0 = h(tx, tz);float ny = 0.01f;float nx = h(tx + ny, tz) - y0;float nz = h(tx, tz + ny) - y0;float nd = 1.0f / sqrtf(nx * nx + ny * ny + nz * nz);float d = (nx + ny - nz) * nd * 0.5f + 0.5f;switch ((int)(d * 5.0f)){case 0: atom.color = 0x111133; break;case 1: atom.color = 0x111144; break;case 2: atom.color = 0x111155; break;case 3: atom.color = 0x111177; break;case 4: atom.color = 0x111199; break;case 5: atom.color = 0x1111aa; break;case 6: atom.color = 0x2222cc; break;case 7: atom.color = 0x2222ee; break;case 8: atom.color = 0x3333ff; break;}// 添加进粒子群_atomGroup.push_back(atom);}_x++;}_y++;}}void InitBlessingWord(){char blessing[7][34] = {// “七夕快乐”文字{ 0,0,0,0,0,0,0, 0,0, 0,0,0,1,0,0,0, 0,0, 0,1,0,0,1,0,0, 0,0, 0,0,0,0,1,0,0 },{ 0,0,1,0,0,0,1, 0,0, 0,0,1,1,1,0,0, 0,0, 0,1,0,1,1,1,1, 0,0, 0,1,1,1,0,0,0 },{ 0,0,1,0,0,1,0, 0,0, 0,1,1,0,0,1,0, 0,0, 0,1,0,0,1,0,1, 0,0, 1,0,0,1,0,0,0 },{ 0,0,1,1,1,0,0, 0,0, 1,0,0,1,0,1,0, 0,0, 1,1,1,1,1,1,1, 0,0, 1,1,1,1,1,1,1 },{ 0,1,1,0,0,0,1, 0,0, 0,0,0,0,1,0,0, 0,0, 0,1,0,0,1,0,0, 0,0, 0,0,0,1,0,0,0 },{ 1,0,0,1,1,1,0, 0,0, 0,0,0,1,0,0,0, 0,0, 0,1,0,1,0,1,0, 0,0, 0,1,0,1,0,1,0 },{ 0,0,0,0,0,0,0, 0,0, 0,0,1,0,0,0,0, 0,0, 0,1,1,0,0,0,1, 0,0, 1,0,0,1,0,0,1 }};// 添加粒子群for (int i = 0; i < 7; i++){for (int j = -17; j < 17; j++){if (blessing[i][j + 17] == 1){Atom a;a.x = j;a.y = 30 + i;a.color = WHITE;_wordGroup.push_back(a);}}}}void Rotate(){// 计算旋转角度_angle_x += (_nowMsg.x - _lastMsg.x) / 100.0;_angle_y += (_nowMsg.y - _lastMsg.y) / 100.0;// 防止角度过大或过小if (fabs(_angle_x) > 2 * M_PI){_angle_x > 0 ? _angle_x -= 2 * M_PI : _angle_x += 2 * M_PI;}if (fabs(_angle_y) > 2 * M_PI){_angle_y > 0 ? _angle_y -= 2 * M_PI : _angle_y += 2 * M_PI;}}void Draw(){static Point p;// 开启批量绘图BeginBatchDraw();// 清空当前画面cleardevice();// 绘制粒子群for (Atom a : _atomGroup){// 设置颜色setfillcolor(a.color);// 获取投影坐标p = GetConvertPoint(a.x, a.y);// 绘制粒子solidrectangle(p.x - Atom::width / 2, p.y - Atom::height / 2, p.x + Atom::width / 2, p.y + Atom::height / 2);}// 绘制文字粒子群setfillcolor(WHITE);for (Atom a : _wordGroup){// 获取投影坐标p = GetConvertPoint(a.x, a.y);// 绘制粒子solidrectangle(p.x - 1, p.y - 1, p.x + 1, p.y + 1);}// 停止批量绘图EndBatchDraw();}Point GetConvertPoint(int x, int y){static int x0, y0;// 将坐标乘以宽高x *= Atom::width;y *= Atom::height;// 计算转换坐标x0 = int(x * cos(_angle_x) + y * sin(_angle_y) * sin(_angle_x));y0 = int(y * cos(_angle_y) + x * sin(_angle_x) * sin(_angle_y));return Point({ x0, y0 });}

3D Heat效果展示

总结

今天的分享到此就结束啦!我们下期再见,别忘了点赞关注加收藏哦!!!!我是爱你们的M malloc!