From b50aa36e4eb57326433592be95d3d99ea36e1645 Mon Sep 17 00:00:00 2001
From: jacob <jacob@cagori.com>
Date: Thu, 13 Nov 2025 23:07:17 -0600
Subject: [PATCH] world units in meters

---
 src/proto/pp_sim/pp_sim_core.c         |  4 ++--
 src/proto/pp_vis/pp_vis_core.c         | 26 +++++++++++++++++++-------
 src/window/window_win32/window_win32.c |  4 ++++
 3 files changed, 25 insertions(+), 9 deletions(-)

diff --git a/src/proto/pp_sim/pp_sim_core.c b/src/proto/pp_sim/pp_sim_core.c
index 179f5f36..0d75e9db 100644
--- a/src/proto/pp_sim/pp_sim_core.c
+++ b/src/proto/pp_sim/pp_sim_core.c
@@ -527,8 +527,8 @@ JobDef(S_SimWorker, _, __)
             {
                 f32 follow_speed = 20 * sim_dt;
                 Vec2 look_ratio = ZI;
-                look_ratio.x = 0.25;
-                look_ratio.y = (16.0 / 9.0) * look_ratio.x;
+                look_ratio.y = 0.25;
+                look_ratio.x = look_ratio.y / (16.0 / 9.0);
 
                 Vec2 target = MulXformV2(follow->world_xf, follow->local_shape.centroid);
                 target = AddVec2(target, MulVec2Vec2(follow->look, look_ratio));
diff --git a/src/proto/pp_vis/pp_vis_core.c b/src/proto/pp_vis/pp_vis_core.c
index 9df4627b..938ea88b 100644
--- a/src/proto/pp_vis/pp_vis_core.c
+++ b/src/proto/pp_vis/pp_vis_core.c
@@ -145,22 +145,23 @@ JobDef(V_VisWorker, _, __)
                         ent->tint = Color_Red;
                         ent->key = player_key;
                         ent->camera = camera_key;
-                        ent->move_speed = 10;
+                        ent->move_speed = 0.1;
                         {
                             ent->local_shape = S_ShapeFromDesc(
                                 .mass = 10,
                                 .count = 1,
-                                .radius = 50,
+                                .radius = 0.4,
                             );
                         }
-                        ent->local_xf = XformFromPos(VEC2(200, 200));
+                        // ent->local_xf = XformFromPos(VEC2(200, 200));
+                        ent->local_xf = XformFromPos(VEC2(0, 0));
                     } break;
 
                     /* Test child */
                     case 1:
                     {
-                        f32 width = 15;
-                        f32 height = 100;
+                        f32 width = 0.1;
+                        f32 height = 1;
 
                         ent->tint = Color_Cyan;
                         ent->key = child_key;
@@ -170,7 +171,7 @@ JobDef(V_VisWorker, _, __)
                                 .count = 4,
                                 .points = {
                                     VEC2(-width / 2, -height), VEC2(width / 2, -height),
-                                    VEC2(width / 2, 0), VEC2(-5, 0),
+                                    VEC2(width / 2, 0), VEC2(-width / 2, 0),
                                 }
                             );
                         }
@@ -227,6 +228,8 @@ JobDef(V_VisWorker, _, __)
             UI_Report vis_rep = UI_ReportFromKey(vis_box);
             draw_size = Vec2I32FromFields(SubVec2(vis_rep.screen_p1, vis_rep.screen_p0));
         }
+        draw_size.x = MaxI32(draw_size.x, 1);
+        draw_size.y = MaxI32(draw_size.y, 1);
 
         //////////////////////////////
         //- Pop sim output
@@ -253,6 +256,8 @@ JobDef(V_VisWorker, _, __)
         //////////////////////////////
         //- Initialize camera
 
+        f32 meters_per_draw_width = 20;
+
         Vec2 camera_pos = ZI;
         f32 camera_zoom = 1;
         {
@@ -268,15 +273,22 @@ JobDef(V_VisWorker, _, __)
         Xform world_to_draw_xf = XformIdentity;
         Xform draw_to_world_xf = XformIdentity;
         {
-            world_to_draw_xf.og = AddVec2(NegVec2(camera_pos), MulVec2(Vec2FromFields(draw_size), 0.5));
+            Vec2 scale = ZI;
+            scale.x = (f32)draw_size.x / meters_per_draw_width;
+            scale.y = scale.x;
+            world_to_draw_xf = XformFromScale(scale);
+            world_to_draw_xf = TranslateXform(world_to_draw_xf, NegVec2(camera_pos));
+            world_to_draw_xf = WorldTranslateXform(world_to_draw_xf, MulVec2(Vec2FromFields(draw_size), 0.5));
             draw_to_world_xf = InvertXform(world_to_draw_xf);
         }
+
         /* Draw <-> ui */
         Xform draw_to_ui_xf = XformIdentity;
         Xform ui_to_draw_xf = XformIdentity;
         {
             ui_to_draw_xf = InvertXform(draw_to_ui_xf);
         }
+
         /* World <-> ui */
         Xform world_to_ui_xf = XformIdentity;
         Xform ui_to_world_xf = XformIdentity;
diff --git a/src/window/window_win32/window_win32.c b/src/window/window_win32/window_win32.c
index 7b81d6ab..6c251282 100644
--- a/src/window/window_win32/window_win32.c
+++ b/src/window/window_win32/window_win32.c
@@ -445,6 +445,8 @@ WND_Frame WND_BeginFrame(void)
         monitor_rect = monitor_info.rcMonitor;
     }
     result.monitor_size = VEC2I32(monitor_rect.right - monitor_rect.left, monitor_rect.bottom - monitor_rect.top);
+    result.monitor_size.x = MaxI32(result.monitor_size.x ,1);
+    result.monitor_size.y = MaxI32(result.monitor_size.y ,1);
 
     /* Client rect */
     RECT client_rect = ZI;
@@ -455,6 +457,8 @@ WND_Frame WND_BeginFrame(void)
     ClientToScreen(hwnd, (LPPOINT)&screen_rect.left);
     ClientToScreen(hwnd, (LPPOINT)&screen_rect.right);
     result.draw_size = VEC2I32(screen_rect.right - screen_rect.left, screen_rect.bottom - screen_rect.top);
+    result.draw_size.x = MaxI32(result.draw_size.x ,1);
+    result.draw_size.y = MaxI32(result.draw_size.y ,1);
 
     /* Minimized / maximized / fullscreen */
     DWORD style = (DWORD)GetWindowLongPtr(hwnd, GWL_STYLE);