From 06995fbd05c50886cec8b08adc682815092b5b26 Mon Sep 17 00:00:00 2001
From: Daniel Bross <daniel@brossferatu.com>
Date: Sun, 30 Mar 2025 23:22:21 +0200
Subject: [PATCH] Custom entity UI, math functions, physics triggers

---
 core/camera.jai     |  4 ++--
 core/math.jai       | 28 ++++++++++++++++++++++++++++
 metaprogram.jai     | 17 +++++++++++++++++
 physics/physics.jai |  2 +-
 4 files changed, 48 insertions(+), 3 deletions(-)

diff --git a/core/camera.jai b/core/camera.jai
index 9eb0d0f..078cf54 100644
--- a/core/camera.jai
+++ b/core/camera.jai
@@ -1,4 +1,4 @@
-Camera_Type :: enum {
+Camera_Projection_Type :: enum {
     ORTHOGRAPHIC;
     PERSPECTIVE;
 }
@@ -10,7 +10,7 @@ Camera_Buffer_Data :: struct {
 }
 
 Camera :: struct {
-    type                : Camera_Type;
+    type                : Camera_Projection_Type;
 
     position            : Vector3;
     rotation            : struct {
diff --git a/core/math.jai b/core/math.jai
index eef0d1d..008f585 100644
--- a/core/math.jai
+++ b/core/math.jai
@@ -368,6 +368,34 @@ reflect :: (incident: Vector3, normal: Vector3) -> Vector3 {
     return reflected;
 }
 
+get_rotated_direction :: (direction: Vector3, by_pitch: float, by_yaw: float, by_roll: float) -> Vector3 {
+    pitch := by_pitch * DEGREES_TO_RADIANS;
+    yaw := by_yaw * DEGREES_TO_RADIANS;
+    roll := by_roll * DEGREES_TO_RADIANS;
+
+    pitch_mat := Matrix4.{
+        1, 0, 0, 0,
+        0, cos(pitch), sin(pitch), 0,
+        0, -sin(pitch), cos(pitch), 0,
+        0, 0, 0, 1};
+
+    yaw_mat := Matrix4.{
+        cos(yaw), 0, -sin(yaw), 0,
+        0, 1, 0, 0,
+        sin(yaw), 0, cos(yaw), 0,
+        0, 0, 0, 1};
+
+    roll_mat := Matrix4.{
+        cos(roll), sin(roll), 0, 0,
+        -sin(roll), cos(roll), 0, 0,
+        0, 0, 1, 0,
+        0, 0, 0, 1};
+
+    matrix := yaw_mat * pitch_mat * roll_mat;
+
+    return normalize(to_v3(matrix * Vector4.{direction.x, direction.y, direction.z, 0.0}));
+}
+
 quat_to_pitch_yaw_roll :: (using q: Quaternion) -> pitch: float, yaw: float, roll: float {
     roll  := atan2(2*y*w - 2*x*z, 1 - 2*y*y - 2*z*z);
     pitch := atan2(2*x*w - 2*y*z, 1 - 2*x*x - 2*z*z);
diff --git a/metaprogram.jai b/metaprogram.jai
index c3e1381..640b313 100644
--- a/metaprogram.jai
+++ b/metaprogram.jai
@@ -406,7 +406,9 @@ generate_ui_procedure_for_entity :: (code_struct: *Code_Struct) {
     ui : String_Builder;
     print_to_builder(*ui, "#if EDITOR {");
     print_to_builder(*ui, "entity_ui_proc :: (e: *%) {\n", name);
+
     generate_member_ui(code_struct.defined_type, *ui);
+
     print_to_builder(*ui, "}\n");
     print_to_builder(*ui, "}");
 
@@ -420,7 +422,13 @@ generate_ui_procedure_for_entity_imgui :: (code_struct: *Code_Struct) {
     ui : String_Builder;
     print_to_builder(*ui, "#if EDITOR {");
     print_to_builder(*ui, "entity_ui_proc_imgui :: (e: *%) {\n", name);
+
     generate_member_ui_imgui(code_struct.defined_type, *ui);
+
+    if wants_custom_ui(code_struct) {
+        print_to_builder(*ui, "custom_ui(e);\n");
+    }
+
     print_to_builder(*ui, "}\n");
     print_to_builder(*ui, "}");
 
@@ -486,6 +494,15 @@ note_struct :: (code_struct: *Code_Struct) {
     }
 }
 
+wants_custom_ui :: (code_struct: *Code_Struct) -> bool {
+    for note: code_struct.defined_type.notes {
+        if to_lower_copy(note,, allocator = temp) == "customui" {
+            return true;
+        }
+    }
+    return false;
+}
+
 message: *Message_Import;
 
 message_loop :: () {
diff --git a/physics/physics.jai b/physics/physics.jai
index 2816dd8..a8f9eb0 100644
--- a/physics/physics.jai
+++ b/physics/physics.jai
@@ -270,7 +270,7 @@ physics_step :: (scene: *Scene, timestep: float) {
                         inv_matrix := inverse(other_e.transform.model_matrix);
                         aabb := other_e.collider.aabb;
                         if point_inside_aabb(aabb, transform_position(e.transform.position, inv_matrix)) {
-                            //add_trigger_overlap_if_new(other_e, e);
+                            add_trigger_overlap_if_new(other_e, e);
                         }
                     } else {
                         point := gjk(e.collider, other_e.collider);