Complete factoring

circledemo.jai

@@ -0,0 +1,6 @@
+#import "Basic";
+#import "Math";
+#import,file "testkit.jai";
+#import,file "physics.jai";
+
+main :: () 

physics.jai

@@ -1,6 +1,6 @@
 #import "Basic";
 #import "Math";
-#import "testkit.jai";
+#import,file "testkit.jai";
 
 TIMESTEP: float = 1.0 / 60.0;
 DEBUGGING :: true;
@@ -17,6 +17,17 @@ normalize :: (using v: *Vector2) -> float {
 
     return sq;
 }
+
+local_to_world :: (using b: Body, local_point: Vector2) -> Vector2 {
+    return rotate(local_point, angle) + pos;
+}
+world_to_local :: (using b: Body, world_point: Vector2) -> Vector2 {
+    // world = rotate(local, angle) + pos
+    // world - pos = rotate(local, angle)
+    // rotate(world - pos, -angle) = local
+    return rotate(world_point - pos, -angle);
+}
+
 normalize :: (v: Vector2) -> Vector2 #must {
     normalize(*v);
     return v;
@@ -35,12 +46,6 @@ negative :: (v: Vector2) -> Vector2 #must {
 cross :: (a: Vector2, b: Vector2) -> float {
     return a.x * b.y - a.y * b.x;
 }
-LastingPip :: struct {
-    alive_for: float;
-    pos: Vector2;
-    d: DrawingSettings;
-}
-
 hit_impulse :: (body_pos: Vector2, mouse_pos: Vector2) -> Vector2 {
     return .{0, -15.0};
     //return normalize(body_pos - mouse_pos) * 15.0;
@@ -184,14 +189,18 @@ draw_body :: (d: DrawingSettings, using b: Body) {
 }
 
 
+circledemo :: () {
+    init();
 
-main :: () {
     bodies: [..]Body;
     array_add(*bodies, .{pos = .{0.0, 0.0}, shape = .{type = .Circle, radius = 1.0}, elasticity = 0.5});
     array_add(*bodies, .{pos = .{0.0, -1003.0}, shape = .{type = .Circle, radius = 1000.0, invmass = 0.0}, elasticity = 1.0}); // ground sphere
     array_add(*bodies, .{pos = .{3.0, 0.0}, shape = .{type = .Circle, radius = 1.0}, elasticity = 0.3});
 
+    unprocessed_time: float = 0.0;
     while !quit {
+        frame_start();
+        defer frame_end();
         // process physics
         unprocessed_time += dt;
         {
@@ -244,28 +253,29 @@ main :: () {
         }
 
         b := bodies[0];
-        pip(.{}, local_to_world(b, world_to_local(b, mouse())));
-
-
+        pip(.{}, local_to_world(b, world_to_local(b, mouse_screen())));
 
-        hovering: *Body = point_query(bodies, screen_to_world(mouse()));
+        hovering: *Body = point_query(bodies, screen_to_world(mouse_screen()));
         for * bodies {
             d: DrawingSettings = .{true, GREEN};
             if hovering == it {
                 d.color = RED;
-                vector(d, screen_to_world(mouse()), hit_impulse(it.pos, screen_to_world(mouse())) * TIMESTEP);
+                vector(d, screen_to_world(mouse_screen()), hit_impulse(it.pos, screen_to_world(mouse_screen())) * TIMESTEP);
             }
             draw_body(d, it);
         }
 
         for Input.events_this_frame {
             if it.type == {
+                case .KEYBOARD;
                 if it.key_code == .MOUSE_BUTTON_LEFT {
                     panning = cast(bool)it.key_pressed;
-                    to_tap := point_query(bodies, screen_to_world(mouse()));
+                    to_tap := point_query(bodies, screen_to_world(mouse_screen()));
+                    if to_tap != null apply_impulse(to_tap, mouse_world(), hit_impulse(to_tap.pos, mouse_screen()));
                 }
             }
         }
-
     }
 }
+
+main :: () { circledemo(); }

testkit.jai

@@ -1,36 +1,50 @@
-
 #import "Window_Creation";
 Debug :: #import "Debug";
 Simp :: #import "Simp";
 Input :: #import "Input";
+#import "Math";
+#import "Basic";
 
 Camera :: struct {
     pos: Vector2;
     zoom: float = 1.0;
 };
 
-window: Window;
+window: Window_Type;
 quit: bool;
+dt: float;
 panning: bool = false;
 camera : Camera; 
 mouse_frozen: bool;
 mouse_frozen_at: Vector2;
 
+last_time: float64;
+last_mouse_pos: Vector2;
 
-local_to_world :: (using b: Body, local_point: Vector2) -> Vector2 {
-    return rotate(local_point, angle) + pos;
-}
-world_to_local :: (using b: Body, world_point: Vector2) -> Vector2 {
-    // world = rotate(local, angle) + pos
-    // world - pos = rotate(local, angle)
-    // rotate(world - pos, -angle) = local
-    return rotate(world_point - pos, -angle);
-}
 window_width  : s32 = 1280;
 window_height : s32 = 720;
 
 dbgprint :: print; // so can be detected and removed
 
+#scope_file;
+normalize :: (using v: *Vector2) -> float {
+    sq := sqrt(x*x + y*y);
+
+    factor := 1.0 / sq;
+    x *= factor;
+    y *= factor;
+
+    return sq;
+}
+normalize :: (v: Vector2) -> Vector2 #must {
+    normalize(*v);
+    return v;
+}
+xy :: (x: int, y: int) -> Vector2 {
+    return xy(cast(float)x, cast(float)y);
+}
+#scope_export;
+
 WHITE :: Vector4.{1.0, 1.0, 1.0, 1.0};
 RED   :: Vector4.{1.0, 0.0, 0.0, 1.0};
 GREEN :: Vector4.{0.0, 1.0, 0.0, 1.0};
@@ -61,6 +75,12 @@ vector :: (d: DrawingSettings, from: Vector2, vector: Vector2) {
     line(d, from + vector, from + vector + rotate(normalize(vector)*arrow_head_length, -PI/2.0 + -PI/4.0));
 }
 
+LastingPip :: struct {
+    alive_for: float;
+    pos: Vector2;
+    d: DrawingSettings;
+};
+
 pips : [10] LastingPip;
 push_pip :: (d: DrawingSettings, at: Vector2) {
     for * pips
@@ -127,20 +147,17 @@ mouse_screen :: () -> Vector2 {
     return pos;
 }
 mouse_world :: () -> Vector2 {
-    return screen_to_world(mouse());
+    return screen_to_world(mouse_screen());
 }
 
 // query quit to see if should quit. Call this in a loop
 frame_start :: () {
-    last_time := get_time();
-    last_mouse_pos := mouse();
-    unprocessed_time: float = 0.0;
 
-    dt := cast(float)(get_time() - last_time);
+    dt = cast(float)(get_time() - last_time);
     last_time = get_time();
     Input.update_window_events();
-    mouse_delta := mouse() - last_mouse_pos; // using Input.mouse_delta_x seems to incorrectly accumulate
-    last_mouse_pos = mouse();
+    mouse_delta := mouse_screen() - last_mouse_pos; // using Input.mouse_delta_x seems to incorrectly accumulate
+    last_mouse_pos = mouse_screen();
 
     for Input.get_window_resizes() {
         Simp.update_window(it.window);  // Simp will do nothing if it doesn't care about this window.
@@ -194,7 +211,7 @@ frame_start :: () {
                     quit = true;
 
                     case #char "T";
-                    if !mouse_frozen mouse_frozen_at = mouse();
+                    if !mouse_frozen mouse_frozen_at = mouse_screen();
                     mouse_frozen = !mouse_frozen;
                 }
             }