145 lines
3.1 KiB
C
145 lines
3.1 KiB
C
#include <stdio.h>
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#include <malloc.h>
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#include <stdlib.h>
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#include <GLFW/glfw3.h>
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#include "particlesystem.h"
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char *printVector(vector3f *v);
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void printParticle(particle *v);
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void printEmitter(emitter *e);
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void initRandomParticles(emitter *e);
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void error_callback(int error, const char* description);
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int main()
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{
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if (!glfwInit())
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{
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exit(EXIT_FAILURE);
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}
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glfwSetErrorCallback(error_callback);
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GLFWwindow* window = glfwCreateWindow(1920, 1080, "My Title", NULL, NULL);
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if (!window)
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{
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glfwTerminate();
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exit(EXIT_FAILURE);
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}
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glfwMakeContextCurrent(window);
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vector3f *epos = initVector3f(0, 0, 0);
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emitter *e = initEmitter(epos, 10000);
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particle_system *ps = initParticleSystem(1);
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(ps->emitters)[0] = e;
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initRandomParticles(e);
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double time, tFrame, tLast = 0;
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int width, height, b = 0;
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while (!glfwWindowShouldClose(window))
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{
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time = glfwGetTime();
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tFrame = time - tLast;
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tLast = time;
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glfwGetFramebufferSize(window, &width, &height);
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for (int i = 0; !b && i < e->pamount; i++)
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{
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vector3f *p = (e->particles)[i]->position;
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if (p->x > 1 || p->x < -1 || p->y > 1 || p->y < -1 || p->z > 1 || p->z < -1)
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{
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b=1;
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}
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}
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if (!b)
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{
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updateParticles((float) tFrame, ps);
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}
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glViewport(0, 0, width, height);
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glClear(GL_COLOR_BUFFER_BIT);
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glBegin(GL_POINTS);
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particle *p;
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vector3f *pos;
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for (int i = 0; i < e->pamount; i++)
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{
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p = (e->particles)[i];
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glColor3f(p->color->x, p->color->y, p->color->z);
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pos = p->position;
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glVertex3f(pos->x, pos->y, pos->z);
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}
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glEnd();
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glfwSwapBuffers(window);
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glfwPollEvents();
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}
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//END
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glfwDestroyWindow(window);
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glfwTerminate();
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free(epos);
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freeParticleSystem(ps);
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return 0;
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}
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void error_callback(int error, const char* description)
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{
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fputs(description, stderr);
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}
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/*************************/
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float rv()
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{
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int i = rand()%2 ? -1 : 1;
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return (float) i * rand() / RAND_MAX;
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}
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/*************************/
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void initRandomParticles(emitter *e)
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{
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for (int i = 0; i < e->pamount; i++)
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{
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vector3f *pos = initVector3f(e->position->x, e->position->y, e->position->z);
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vector3f *dir = initVector3f(rv(), rv(), rv());
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vector3f *color = initVector3f(255, 255, 255);
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(e->particles)[i] = initParticle(pos, dir, color, 100.f);
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}
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}
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char *printVector(vector3f *v)
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{
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char *c = malloc(100);
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sprintf(c, "(%f, %f, %f)", v->x, v->y, v->z);
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return c;
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}
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void printParticle(particle *v)
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{
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printf(" Particle {\n");
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printf(" position = %s", printVector(v->position));
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printf("\n direction = %s", printVector(v->direction));
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printf("\n }");
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}
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void printEmitter(emitter *e)
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{
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printf("Emitter {\n");
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for (int i = 0; i < e->pamount; i++)
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{
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printParticle((e->particles)[i]);
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printf("\n");
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}
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printf("\n}");
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}
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