144 lines
3.5 KiB
C
144 lines
3.5 KiB
C
#include <stdio.h>
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#include <malloc.h>
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#include <stdlib.h>
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#include "particlesystem.h"
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#include "initOpenGL.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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void calcPos(particle *p, float dt);
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void calcCol(particle *p);
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int main()
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{
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// Init OpenGL and GLFW
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initGLFW();
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setErrorCallbackGL();
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int width = 800, height = 800;
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GLFWwindow *window = createGLFWWindow(width, height, "Informatikprojekt - OpenGL");
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setCurrentContextGL(window);
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setFramebufferSizeCallbackGL(window);
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// glad
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initGlad();
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vector3f *epos = initVector3f(0, 0, 0);
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emitter *e = initEmitter(epos, 1000);
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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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unsigned int vbo;
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float vert[3] = {0.1f, 0.2f, 0.3f};
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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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glClear(GL_COLOR_BUFFER_BIT);
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glfwGetFramebufferSize(window, &width, &height);
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initVertexBuffer(&vbo, vert);
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updateParticles((float) tFrame, ps, calcPos, calcCol);
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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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glBegin(GL_POINTS);
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glVertex3f(pos->x, pos->y, pos->z);
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glEnd();
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/*glBegin(GL_QUADS);
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glVertex3f(pos->x, pos->y, pos->z);
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glVertex3f(pos->x+.01, pos->y, pos->z);
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glVertex3f(pos->x+.01, pos->y-.01, pos->z);
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glVertex3f(pos->x, pos->y-.01, pos->z);
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glEnd();*/
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}
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glfwSwapBuffers(window);
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glfwPollEvents();
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}
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//END
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terminateGLFW(window);
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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 calcPos(particle *p, float dt)
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{
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p->position->x += p->direction->x * dt;
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p->position->y += p->direction->y * dt;
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p->position->z += p->direction->z * dt;
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}
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void calcCol(particle *p)
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{
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p->color->x = 1;
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p->color->y = 1;
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p->color->z = 1;
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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(((float) (rand()%2 ? -1 : 1) * rand()) / RAND_MAX,
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((float) (rand()%2 ? -1 : 1) * rand()) / RAND_MAX,
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((float) (rand()%2 ? -1 : 1) * rand()) / RAND_MAX);
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vector3f *color = initVector3f(1, 1, 1);
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(e->particles)[i] = initParticle(pos, dir, color, rand() / 100.0f);
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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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