From: John Tsiombikas <nuclear@member.fsf.org>
Date: Tue, 14 Aug 2018 23:56:19 +0000 (+0300)
Subject: panning
X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?p=ld42_outofspace;a=commitdiff_plain;h=8ac9e0e139b1f523c333ed2c33b81291f54def09

panning
---

diff --git a/src/gamescr.cc b/src/gamescr.cc
index 06b0429..3eec738 100644
--- a/src/gamescr.cc
+++ b/src/gamescr.cc
@@ -89,6 +89,8 @@ static void remove_particle(Particle *p);
 static Particle *alloc_particle();
 void free_particle(Particle *p);
 
+static bool pause;
+
 static float grid[GRID_SIZE * GRID_SIZE];
 static Particle *grid_part[GRID_SIZE * GRID_SIZE];
 static Texture *grid_tex;
@@ -107,9 +109,10 @@ static QuadMesh field_mesh;
 static Mesh *pmesh;
 static unsigned int particle_sdr;
 
+static Vec2 cam_pos;
 static float cam_theta;
 static float cam_dist = 100.0f;
-static Vec2 *targ_pos;
+static Vec2 *targ_pos = &cam_pos;
 static Mat4 view_matrix, proj_matrix;
 
 static bool wireframe;
@@ -177,6 +180,8 @@ void GameScreen::destroy()
 
 static void simstep()
 {
+	if(pause) return;
+
 	// move existing particles
 	Particle *p = plist;
 	while(p) {
@@ -452,6 +457,10 @@ void GameScreen::keyboard(int key, bool pressed)
 			wireframe = !wireframe;
 			break;
 
+		case ' ':
+			pause = !pause;
+			break;
+
 		default:
 			break;
 		}
@@ -473,6 +482,13 @@ void GameScreen::mmotion(int x, int y)
 	prev_x = x;
 	prev_y = y;
 
+	if(game_bnstate(0)) {
+		float pan_speed = pow(cam_dist, 1.5) * 0.00035;	// magic
+		Vec2 dir = rotate(Vec2(dx, dy) * pan_speed, deg_to_rad(cam_theta));
+		cam_pos.x -= dir.x;
+		cam_pos.y -= dir.y;
+	}
+
 	if(game_bnstate(2)) {
 		cam_theta += dx * 0.5;
 	}