Initial commit

1 files changed, 62 insertions, 0 deletions

diff --git a/09-september/tomcat/particles/particles.h b/09-september/tomcat/particles/particles.h
new file mode 100644
index 0000000..8404ff4
--- /dev/null
+++ b/09-september/tomcat/particles/particles.h
@@ -0,0 +1,62 @@
+#ifndef PARTICLES_H
+#define PARTICLES_H
+
+#include "../renderer/renderer_types.h"
+#include "../math/vector.h"
+
+#define MAX_PARTICLES_PER_SYSTEM 10000
+#define MAX_PARTICLES_SYSTEMS 10
+
+typedef struct _Particle
+{
+    Vec3 position;
+    Vec3 velocity;
+
+    Vec2 tex_offset; /* Used for animating */
+
+    GLfloat weight; /* How does the gravity affect the particle (In theory it should be a vector)*/
+    GLfloat life_length;
+    GLfloat rotation;
+    GLfloat scale;
+    GLfloat distance_to_camera; /* Used for sorting the systems */
+
+    GLfloat elapsed_time;
+} Particle;
+
+typedef struct _ParticleSystem
+{
+    Vec3 position;
+
+    GLint emit_rate;
+    GLfloat speed;
+    GLfloat weight;
+    GLfloat life_length;
+
+    bool additive; /* Additive vs alpha blending */
+
+    Texture *texture;
+    Particle particles[MAX_PARTICLES_PER_SYSTEM];
+    int num_particles;
+
+} ParticleSystem;
+
+typedef struct
+{
+    ParticleSystem *systems[MAX_PARTICLES_SYSTEMS];
+    int num_systems;
+} ParticleManager;
+
+extern ParticleManager particles;
+
+extern void Particles_Init();
+
+extern ParticleSystem *Particles_AddSystem();
+extern void Particles_RemoveSystem(ParticleSystem *system);
+/* Used for manual emission */
+extern void Particles_EmitParticle(ParticleSystem *system, Particle *p);
+/* Removes a particle if it "dies" */
+extern void Particles_Update(const Vec3 *camera_position);
+/* We need to delete all dynamically allocated particles that still remains */
+extern void Particles_Shutdown();
+
+#endif // PARTICLES_H