1 files changed, 83 insertions, 0 deletions
diff --git a/src/particlesystem.h b/src/particlesystem.h
new file mode 100644
index 0000000..9744153
--- /dev/null
+++ b/src/particlesystem.h
@@ -0,0 +1,83 @@
+
+#ifndef PARTICLESYSTEM_H
+#define PARTICLESYSTEM_H
+
+#include <iostream>
+#define EIGEN_DISABLE_UNALIGNED_ARRAY_ASSERT
+#define EIGEN_DONT_VECTORIZE
+#include "graphics/shader.h"
+#include "graphics/camera.h"
+
+#include <Eigen/Core>
+#include <Eigen/Dense>
+#include <Eigen/Sparse>
+#include <Eigen/Geometry>
+
+struct Particle{
+    Eigen::Vector3f pos = Eigen::Vector3f(0,0,0);
+    Eigen::Vector3f vel = Eigen::Vector3f(0,2000,0);
+
+    Eigen::Vector4f color = Eigen::Vector4f(1,1,1,1);
+    float life = 1.f;
+
+};
+
+class particlesystem
+{
+public:
+    particlesystem();
+
+    void update(double deltaTime);
+    void draw(Shader *skybox_shader, Camera  m_camera);
+    void draw(Shader *shader, Camera  m_camera, std::vector<Eigen::Vector3f> verts, Eigen::Matrix4f model);
+
+    void init(std::vector<Eigen::Vector3f> verts);
+
+    void setVerts(std::vector<Eigen::Vector3f> verts){
+        std::cout << "VERTS SIZE:" << verts.size() << std::endl;
+        m_verts = verts;
+
+    }
+
+
+
+private:
+    int m_amount = 500;
+    int m_new_amount = 100; // new particles per frame
+    int lastUsedIndex = 0;
+    Eigen::Vector3f gravity = Eigen::Vector3f(0,-9.81f,0);
+    float factor = 10.f; // velocity multiplier
+
+
+
+    void respawn_particle(Particle &p, Eigen::Vector3f new_pos);
+    int getUnusedParticleIndex();
+    Eigen::Vector3f getRandomInitialVel();
+
+
+
+
+    float d = 5.f;
+    std::vector<float> m_vertices = {
+        -d, d,
+        d,d,
+        -d, -d,
+        d, d,
+        d, -d,
+        -d, -d
+    };
+
+    GLuint VAO, VBO; // holds quad shape
+
+
+
+
+
+
+    std::vector<Particle> m_particles;
+
+    std::vector<Eigen::Vector3f> m_verts;
+
+};
+
+#endif // PARTICLESYSTEM_H