break out GameOrbit and GameState to game.h

Makefile

@@ -29,7 +29,7 @@ IMGUI_SOURCES := $(filter-out $(IMGUI_DIR)/imgui_demo.cpp, $(wildcard $(IMGUI_DI
 IMGUI_OBJECTS := $(patsubst $(IMGUI_DIR)/%.cpp, $(OBJDIR)/%.o, $(IMGUI_SOURCES))
 IMGUI_IMP_OBJECTS += $(patsubst $(IMGUI_IMPL_DIR)/%.cpp, $(OBJDIR)/%.o, $(IMGUI_IMPL_SOURCES))
 
-SOURCES := $(SRCDIR)/main.cpp $(SRCDIR)/gooey.cpp
+SOURCES := $(SRCDIR)/main.cpp $(SRCDIR)/gooey.cpp $(SRCDIR)/game.cpp
 OBJECTS := $(patsubst $(SRCDIR)/%.cpp, $(OBJDIR)/%.o, $(SOURCES))
 BIN := $(BINDIR)/orbital_shipping
 

src/game.cpp

@@ -0,0 +1,35 @@
+
+#include "game.h"
+
+
+GameOrbit*
+getFreeOrbit(GameState* gs)
+{
+	GameOrbit* orbit = nullptr;
+
+	// NOTE: first check if we have a freed orbit to use
+	for (u32 i = 0; i < gs->num_orbits; i++) {
+		if (!gs->orbits[i].in_use)
+			orbit = &gs->orbits[i];
+	}
+
+	// NOTE: if we can't re-use a freed orbit, initialize a new one
+	if (!orbit) {
+		assert(gs->num_orbits < gs->max_orbits);
+		orbit = &gs->orbits[gs->num_orbits++];
+	}
+
+	orbit->in_use = true;
+	return orbit;
+}
+
+void
+disableGameOrbit(GameOrbit* orbit)
+{
+	orbit->in_use = false;
+	orbit->selected = false;
+	orbit->system = {0};
+	orbit->grav_body = nullptr;
+	orbit->ellipse_entity = nullptr;
+	orbit->satellite_entity = nullptr;
+}

src/game.h

@@ -0,0 +1,34 @@
+#pragma once
+
+#include "tangerine.h"
+#include "orbits.h"
+
+
+struct GameOrbit
+{
+	TwoBodySystem system;
+
+	Entity* grav_body;
+	Entity* ellipse_entity;
+	Entity* satellite_entity;
+	bool in_use;
+	bool selected;
+};
+
+struct GameState
+{
+	bool running;
+	MemoryArena* arena;
+
+	u64 game_time_ms;
+	u64 sim_time_ms;
+	float sim_speed;
+
+	GameOrbit* orbits;
+	u32 num_orbits;
+	u32 max_orbits;
+};
+
+GameOrbit* getFreeOrbit(GameState* gs);
+
+void disableGameOrbit(GameOrbit* orbit);

src/main.cpp

@@ -22,6 +22,7 @@
 #include "input.h"
 #include "tangerine.h"
 
+#include "game.h"
 #include "gooey.h"
 #include "orbits.h"
 
@@ -32,61 +33,6 @@ const vec4 g_light_color = vec4(0.5, 0.5, 0.5, 1);
 const uvec4 g_light_intensities = uvec4(1, 0, 0, 0);
 
 
-struct GameOrbit
-{
-	TwoBodySystem system;
-
-	Entity* grav_body;
-	Entity* ellipse_entity;
-	Entity* satellite_entity;
-	bool in_use;
-};
-
-struct GameState
-{
-	bool running;
-	MemoryArena* arena;
-
-	u64 game_time_ms;
-	u64 sim_time_ms;
-	float sim_speed;
-
-	GameOrbit* orbits;
-	u32 num_orbits;
-	u32 max_orbits;
-};
-
-GameOrbit*
-getFreeOrbit(GameState* gs)
-{
-	GameOrbit* orbit = nullptr;
-
-	// NOTE: first check if we have a freed orbit to use
-	for (u32 i = 0; i < gs->num_orbits; i++) {
-		if (!gs->orbits[i].in_use)
-			orbit = &gs->orbits[i];
-	}
-
-	// NOTE: if we can't re-use a freed orbit, initialize a new one
-	if (!orbit) {
-		assert(gs->num_orbits < gs->max_orbits);
-		orbit = &gs->orbits[gs->num_orbits++];
-	}
-
-	orbit->in_use = true;
-	return orbit;
-}
-
-void
-disableGameOrbit(GameOrbit* orbit)
-{
-	orbit->in_use = false;
-	orbit->system = {0};
-	orbit->grav_body = nullptr;
-	orbit->ellipse_entity = nullptr;
-	orbit->satellite_entity = nullptr;
-}
-
 void
 initCamera(RenderState* rs, vec3 cam_pos, vec3 cam_focus, vec3 cam_up)
 {