first commit

main.c

@@ -0,0 +1,104 @@
+#include <stddef.h>
+#include <raylib.h>
+#include <stdio.h>
+#include "objects.h"
+
+struct global {
+  const int scwidth, scheight;
+  int fps;
+  object *objs[128];
+  size_t obj_count;
+  double terminal_yv;
+};
+
+struct global gl = {1600, 900, 60, {}, 0, -20};
+
+void addobj(object *obj)
+{
+  gl.objs[gl.obj_count++] = obj;
+}
+
+void drawobjs()
+{
+  for (int i = 0; i < gl.obj_count; i++)
+  {
+    object *obj = gl.objs[i];
+    DrawSphere(obj->pos, obj->r, obj->color);
+  }
+}
+
+void updateobjs()
+{
+  for (int i = 0; i < gl.obj_count; i++)
+  {
+    object *obj = gl.objs[i];
+    obj->vel.y -= 9.81 * GetFrameTime();
+    if (obj->vel.y < gl.terminal_yv)
+    {
+      obj->vel.y = gl.terminal_yv;
+    }
+    if (obj->pos.y < obj->r) {
+      obj->pos.y = obj->r;
+      obj->vel.y *= -obj->restitution;
+    }
+    obj->pos.x += obj->vel.x * GetFrameTime();
+    obj->pos.y += obj->vel.y * GetFrameTime();
+    obj->pos.z += obj->vel.z * GetFrameTime();
+  } 
+}
+
+void freeobjs()
+{
+  for (int i = 0; i < gl.obj_count; i++)
+  {
+    object *obj = gl.objs[i];
+    free(obj);
+  } 
+}
+
+void applyforce()
+{
+  for (int i = 0; i < gl.obj_count; i++)
+  {
+    object *obj = gl.objs[i];
+    obj->vel.x += 1;
+  }
+}
+
+int main(void) {
+
+  InitWindow(gl.scwidth, gl.scheight, "raylib engine");
+
+  SetTargetFPS(gl.fps);
+  addobj(newobj((Vector3){0, 30, 0}, 2, RED, 0.5));
+  addobj(newobj((Vector3){5, 2, 0}, 1, BLUE, 1));
+  Camera3D camera = {{0, 20, -30}, {0, 0, 0}, {0, 1, 0}, 45, CAMERA_PERSPECTIVE};
+
+  while(!WindowShouldClose())
+  {
+
+    UpdateCamera(&camera, CAMERA_FREE);
+    BeginDrawing();
+    {
+      ClearBackground(BLACK);
+      BeginMode3D(camera);
+      DrawPlane((Vector3){0, 0, 0}, (Vector2){100, 100}, GRAY);
+      updateobjs();
+      drawobjs();
+
+      if (IsKeyPressed(KEY_L)) {
+        applyforce();
+      }
+
+      EndMode3D();
+    }
+    EndDrawing();
+  }
+
+  freeobjs();
+
+  CloseWindow();
+
+  return 0;
+
+}

objects.h

@@ -0,0 +1,22 @@
+#pragma once
+#include <raylib.h>
+#include <stdlib.h>
+
+typedef struct {
+  Vector3 pos;
+  Vector3 vel;
+  float r;
+  Color color;
+  float restitution;
+} object;
+
+object *newobj(Vector3 pos, float r, Color c, float rest)
+{
+  object *obj = (object*)malloc(sizeof(object));
+  obj->r = r;
+  obj->pos = pos;
+  obj->color = c;
+  obj->vel = (Vector3){0, 0, 0};
+  obj->restitution = rest;
+  return obj;
+}