clamp camera rotation to +z and clamp vAngle

.gdb_history

@@ -0,0 +1 @@
+q

src/hexgame.cpp

@@ -354,6 +354,8 @@ processSDLEvents()
 					case SDLK_f: g->is_moveright = true; break;
 					case SDLK_SPACE: g->is_moveup = true; break;
 					case SDLK_c: g->is_movedown = true; break;
+					case SDLK_r: g->is_rotateCW = true; break;
+					case SDLK_w: g->is_rotateCCW = true; break;
 				}
 				break;
 			case SDL_KEYUP:
@@ -365,6 +367,8 @@ processSDLEvents()
 					case SDLK_f: g->is_moveright = false; break;
 					case SDLK_SPACE: g->is_moveup = false; break;
 					case SDLK_c: g->is_movedown = false; break;
+					case SDLK_r: g->is_rotateCW = false; break;
+					case SDLK_w: g->is_rotateCCW = false; break;
 				}
 				break;
 			case SDL_MOUSEBUTTONDOWN:
@@ -514,6 +518,7 @@ int main(int argc, char* argv[])
 		render_state* r = g_render_state;
 		moveCamera(g->is_moveup, g->is_moveleft, g->is_movedown, g->is_moveright,
 				g->is_moveforward, g->is_movebackward);
+		rollCamera(g->is_rotateCW, g->is_rotateCCW);
 		renderFrame(g->hex_array);
 		if (r->is_debug_draw && g->draw_mode == CONE_FILL)
 			renderDebug(g_polygon_select_vertices);

src/hexgame.h

@@ -85,6 +85,14 @@ struct render_state
 
 struct game_state
 {
+	std::vector<hex_info> *hex_array;
+	hex_info *start_hex;
+	hex_info *current_hex;
+	vector<hex_info> selected_hexes;
+	HexDrawMode draw_mode;
+	const Layout hex_layout;
+
+	// movement controls
 	bool is_selecting = false;
 	bool is_camera_rotate = false;
 	bool is_moveforward = false;
@@ -93,12 +101,8 @@ struct game_state
 	bool is_movedown = false;
 	bool is_moveleft = false;
 	bool is_moveright = false;
-	std::vector<hex_info> *hex_array;
-	hex_info *start_hex;
-	hex_info *current_hex;
-	vector<hex_info> selected_hexes;
-	HexDrawMode draw_mode;
-	const Layout hex_layout;
+	bool is_rotateCW = false;
+	bool is_rotateCCW = false;
 
 	game_state(Layout &l) : hex_layout(l) {}
 };

src/renderer.h

@@ -124,6 +124,7 @@ bool initRenderer(SDL_Handles &handles, v2i vpDims);
 bool addTexture(SDL_Handles &handles, std::string path);
 bool createScene(std::vector<hex_info>* hexes);
 void moveCamera(bool up, bool left, bool down, bool right, bool forward, bool backward);
+void rollCamera(bool CW, bool CCW);
 void rotateCamera(int32	xrel, int32 yrel);
 void renderFrame(const std::vector<hex_info> *hexes);
 void renderDebug(std::vector<Point> &vertices);
@@ -273,11 +274,10 @@ initMatrices(projection_type p)
 {
 	if (p == PERSPECTIVE)
 	{
-		g_scene_matrices.projection = glm::perspective(
+		g_scene_matrices.projection = glm::infinitePerspective(
 			glm::radians(60.f), // FoV
 			16.f / 9.f, // ascpect ratio
-			0.1f, // near clip plane
-			1000.0f // far clip plane
+			0.1f // near clip plane
 		);
 
 		g_camera.position = glm::vec3(640,0,100); 
@@ -400,6 +400,7 @@ moveCamera(bool up, bool left, bool down, bool right, bool forward, bool backwar
 	glm::vec3 u = g_camera.up;
 	glm::vec3 old = g_camera.position;
 	glm::vec3 &p = g_camera.position;
+
 	if (forward) p += f * d;
 	if (backward) p -= f * d;
 	if (up) p += u * d;
@@ -428,16 +429,46 @@ rotateCamera(int32	xrel, int32 yrel)
 	float &v = c.vAngle;
 	h += 0.005f * xrel;
 	v -= 0.005f * yrel;
+
+	// clamp vAngle to + or - 85 degrees to prevent gimbal lock
+	float a = glm::radians(85.f);
+	if (v < (-1 * a)) v = (-1 * a);
+	if (v > a) v = a;
+	
 	c.forward = glm::vec3(
 		glm::cos(v) * glm::sin(h),
 		glm::cos(v) * glm::cos(h),
 		glm::sin(v)
 	);
 
+	c.up = glm::vec3(0,0,1);
+	c.left = glm::cross(c.forward, c.up);
+
 	g_scene_matrices.view = glm::lookAt(c.position, c.position + c.forward, c.up);
 	g_scene_matrices.MVP = g_scene_matrices.projection * g_scene_matrices.view * g_scene_matrices.model; 
 }
 
+// NOTE: don't need this yet
+void
+rollCamera(bool CW, bool CCW)
+{
+#if 0
+	if ((!CW && !CCW) || (CW && CCW))
+		return;
+
+	float a = 0.005f;
+	if (CW) a *= 1;
+	if (CCW) a *= -1;
+	camera &c = g_camera;
+	glm::mat4 m = glm::rotate(glm::mat4(1.f), a, c.forward);
+	glm::vec4 v(c.up.x, c.up.y, c.up.z, 0);
+	v = v * m;
+	g_camera.up = glm::vec3(v.x, v.y, v.z);
+	g_scene_matrices.view *= m;
+	g_scene_matrices.MVP = g_scene_matrices.projection * g_scene_matrices.view * g_scene_matrices.model; 
+#endif
+}
+
 void
 fillTriangleBufferFromHex(GLfloat buf[], int idx,  const hex_info &hex)
 {