How to write simple fireworks code in C language
To write a simple C language fireworks code, you need to follow the following steps: Include header files and libraries. Define constants and macros. Create a particle data structure. Declare global variables. Initialize the fireworks particles in the main() function. Update the particle's position and velocity in the game loop and draw them. Check for and destroy particles that have reached their end of life.
Simple Fireworks Code in C
To write a simple fireworks code in C, you can use the following steps ：
1. Header files and libraries
#include <stdio.h> #include <stdlib.h> #include <math.h> #include <time.h>
2. Constants and macro definitions
Define some for controlling the appearance of fireworks and behavior constants and macros:
#define NUM_PARTICLES 100 #define MAX_SPEED 10 #define MAX_LIFETIME 200 #define GRAVITY 0.1
3. Data structure
Create a structure to store the data of a single firework particle:
typedef struct {
double x, y; // 粒子的位置
double vx, vy; // 粒子的速度
double lifetime; // 粒子的剩余寿命
int color; // 粒子的颜色
} Particle;4. Global variables
Declare an array to store fireworks particles:
Particle particles[NUM_PARTICLES];
5. Initialization
inmain() function, use the srand() function to seed the random number generator, and then randomly initialize the fireworks particles:
int main() {
srand(time(NULL));
for (int i = 0; i < NUM_PARTICLES; i++) {
particles[i].x = rand() % 800;
particles[i].y = 600;
particles[i].vx = (rand() % 2000 - 1000) / 100.0;
particles[i].vy = (rand() % 2000 - 1000) / 100.0;
particles[i].lifetime = MAX_LIFETIME;
particles[i].color = rand() % 6;
}
// ...
}6. Update and draw
In the game loop, update the position and velocity of each firework particle and draw them:
void update() {
for (int i = 0; i < NUM_PARTICLES; i++) {
particles[i].x += particles[i].vx;
particles[i].y += particles[i].vy;
particles[i].vy += GRAVITY;
particles[i].lifetime--;
// 绘制粒子
// ...
}
}#7. Check for destruction
In each update loop , check whether the life of each firework particle has expired, and if so, destroy it from the array:
void check_destroy() {
for (int i = 0; i < NUM_PARTICLES; i++) {
if (particles[i].lifetime <= 0) {
particles[i] = particles[NUM_PARTICLES - 1];
NUM_PARTICLES--;
}
}
}The above is the detailed content of How to write simple fireworks code in C language. For more information, please follow other related articles on the PHP Chinese website!
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