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C++烟花代码：简单完整实现
2023-07-06 12:00:57 深夜i     --     --
C++ 烟花 代码 实现 完整

近年来，烟花音乐会一直是人们喜爱的文化活动，而制作烟花程序已成为了程序员们热衷的领域之一。本文将简单介绍一下使用C++实现烟花程序的过程。

首先，我们需要定义烟花的基本属性，如颜色、位置、大小、速度等。这些属性可以定义为结构体或类中的成员。例如：



struct Firework vy;//粒子速度


  double radius;//粒子半径


  double red;

接着，我们需要定义烟花的生成函数和爆炸函数。生成函数会在屏幕上产生一颗烟花，爆炸函数会将烟花粒子扩散开来，并渐渐消失。以下是生成函数和爆炸函数的代码：



void generateFirework(double x, double y){


  Firework firework;


  firework.x = x;


  firework.y = y;


  firework.vx = (rand()%10 - 5.0)/2.0;


  firework.vy = -5 - rand()%5;


  firework.radius = 3;


  firework.red = (double)rand()/RAND_MAX;


  firework.green = (double)rand()/RAND_MAX;


  firework.blue = (double)rand()/RAND_MAX;


  fireworks.push_back(firework);


}


void explodeFirework(Firework firework){


  for(int i=0; i<50; i++){


    Firework particle;


    particle.x = firework.x;


    particle.y = firework.y;


    double velocity = (double)rand()/RAND_MAX * 5 + 5;


    double angle = (double)rand()/RAND_MAX * 2 * 3.1415926;


    particle.vx = velocity * cos(angle);


    particle.vy = velocity * sin(angle);


    particle.radius = 2;


    particle.red = firework.red;


    particle.green = firework.green;


    particle.blue = firework.blue;


    particles.push_back(particle);


  }


}

最后，我们需要循环更新屏幕上的烟花粒子。在每一帧中，我们会先画出爆炸产生的粒子，然后更新烟花粒子的位置，并画出它们。如果烟花的速度为0，便说明烟花已经达到了顶点，需要进行爆炸操作。以下是主循环的代码：



while(!glShouldClose(window)){


  glClearColor(0.0, 0.0, 0.0, 1.0);


  glClear(GL_COLOR_BUFFER_BIT);


  


  for(int i=0; i<particles.size(); i++){


    particles[i].x += particles[i].vx * 0.1;


    particles[i].y += particles[i].vy * 0.1;


    particles[i].vx *= 0.985;


    particles[i].vy *= 0.985;


    glBegin(GL_POINTS);


    glColor3f(particles[i].red, particles[i].green, particles[i].blue);


    glVertex2f(particles[i].x, particles[i].y);


    glEnd();


  }


  for(int i=0; i<fireworks.size(); i++){


    fireworks[i].x += fireworks[i].vx * 0.1;


    fireworks[i].y += fireworks[i].vy * 0.1;


    fireworks[i].vy += 0.05;


    glBegin(GL_POINTS);


    glColor3f(fireworks[i].red, fireworks[i].green, fireworks[i].blue);


    glVertex2f(fireworks[i].x, fireworks[i].y);


    glEnd();


    if(fireworks[i].vy > 0 && !fireworks[i].exploded){


      explodeFirework(fireworks[i]);


      fireworks[i].exploded = true;


    }


  }


  for(int i=0; i<fireworks.size(); i++){


    if(fireworks[i].vy >= 0 && fireworks[i].exploded && particles.empty()){


      fireworks.erase(fireworks.begin() + i);


    }


  }


  glfwSwapBuffers(window);


  glfwPollEvents();


}

在定义完以上内容后，我们只需要在main函数中创建窗口并调用主循环即可。完整代码如下：



#include <GL/glew.h>


#include <GLFW/glfw3.h>


#include <stdlib.h>


#include <vector>


#include <math.h>


#include <time.h>


using namespace std;


struct Firework blue;


  bool exploded = false;


;


vector<Firework> fireworks;


vector<Firework> particles;


void generateFirework(double x, double y){


  Firework firework;


  firework.x = x;


  firework.y = y;


  firework.vx = (rand()%10 - 5.0)/2.0;


  firework.vy = -5 - rand()%5;


  firework.radius = 3;


  firework.red = (double)rand()/RAND_MAX;


  firework.green = (double)rand()/RAND_MAX;


  firework.blue = (double)rand()/RAND_MAX;


  fireworks.push_back(firework);


}


void explodeFirework(Firework firework){


  for(int i=0; i<50; i++){


    Firework particle;


    particle.x = firework.x;


    particle.y = firework.y;


    double velocity = (double)rand()/RAND_MAX * 5 + 5;


    double angle = (double)rand()/RAND_MAX * 2 * 3.1415926;


    particle.vx = velocity * cos(angle);


    particle.vy = velocity * sin(angle);


    particle.radius = 2;


    particle.red = firework.red;


    particle.green = firework.green;


    particle.blue = firework.blue;


    particles.push_back(particle);


  }


}


int main(){


  if(!glfwInit()){


    exit(EXIT_FAILURE);


  }


  GLFWwindow* window = glfwCreateWindow(640, 480, "Fireworks", NULL, NULL);


  if(!window){


    glfwTerminate();


    exit(EXIT_FAILURE);


  }


  glewExperimental = true;


  if(glewInit() != GLEW_OK){


    glfwTerminate();


    exit(EXIT_FAILURE);


  }


  srand(time(NULL));


  generateFirework(320, 50);


  while(!glfwWindowShouldClose(window)){


    glClearColor(0.0, 0.0, 0.0, 1.0);


    glClear(GL_COLOR_BUFFER_BIT);


    for(int i=0; i<particles.size(); i++){


      particles[i].x += particles[i].vx * 0.1;


      particles[i].y += particles[i].vy * 0.1;


      particles[i].vx *= 0.985;


      particles[i].vy *= 0.985;


      glBegin(GL_POINTS);


      glColor3f(particles[i].red, particles[i].green, particles[i].blue);


      glVertex2f(particles[i].x, particles[i].y);


      glEnd();


    }


    for(int i=0; i<fireworks.size(); i++){


      fireworks[i].x += fireworks[i].vx * 0.1;


      fireworks[i].y += fireworks[i].vy * 0.1;


      fireworks[i].vy += 0.05;


      glBegin(GL_POINTS);


      glColor3f(fireworks[i].red, fireworks[i].green, fireworks[i].blue);


      glVertex2f(fireworks[i].x, fireworks[i].y);


      glEnd();


      if(fireworks[i].vy > 0 && !fireworks[i].exploded){


        explodeFirework(fireworks[i]);


        fireworks[i].exploded = true;


      }


    }


    for(int i=0; i<fireworks.size(); i++){


      if(fireworks[i].vy >= 0 && fireworks[i].exploded && particles.empty()){


        fireworks.erase(fireworks.begin() + i);


      }


    }


    glfwSwapBuffers(window);


    glfwPollEvents();


  }


  glfwDestroyWindow(window);


  glfwTerminate();


  exit(EXIT_SUCCESS);


}

以上便是使用C++实现烟花程序的简单过程，读者可以根据自己的需求进行修改和扩展。

  
  

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