From ba319d8499ff20e6a34b82be8888b5d2b64e5d9b Mon Sep 17 00:00:00 2001
From: Wojtek Figat <wojtek@figat.pl>
Date: Sat, 29 Apr 2023 12:09:36 +0200
Subject: [PATCH] Add scale parameter to `DebugDraw` text drawing to rescale
 text without reducing font size

---
 Source/Engine/Debug/DebugDraw.cpp | 10 ++++++++--
 Source/Engine/Debug/DebugDraw.h   |  3 ++-
 2 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/Source/Engine/Debug/DebugDraw.cpp b/Source/Engine/Debug/DebugDraw.cpp
index a1dfa0b61..47a2b6534 100644
--- a/Source/Engine/Debug/DebugDraw.cpp
+++ b/Source/Engine/Debug/DebugDraw.cpp
@@ -454,7 +454,12 @@ inline void DrawText3D(const DebugText3D& t, const RenderContext& renderContext,
 {
     Matrix w, fw, m;
     if (t.FaceCamera)
-        Matrix::CreateWorld(t.Transform.Translation, renderContext.View.Direction, viewUp, w);
+    {
+        Matrix s, ss;
+        Matrix::Scaling(t.Transform.Scale.X, s);
+        Matrix::CreateWorld(t.Transform.Translation, renderContext.View.Direction, viewUp, ss);
+        Matrix::Multiply(s, ss, w);
+    }
     else
         t.Transform.GetWorld(w);
     Matrix::Multiply(f, w, fw);
@@ -1993,7 +1998,7 @@ void DebugDraw::DrawText(const StringView& text, const Float2& position, const C
     t.TimeLeft = duration;
 }
 
-void DebugDraw::DrawText(const StringView& text, const Vector3& position, const Color& color, int32 size, float duration)
+void DebugDraw::DrawText(const StringView& text, const Vector3& position, const Color& color, int32 size, float duration, float scale)
 {
     if (text.Length() == 0 || size < 4)
         return;
@@ -2003,6 +2008,7 @@ void DebugDraw::DrawText(const StringView& text, const Vector3& position, const
     Platform::MemoryCopy(t.Text.Get(), text.Get(), text.Length() * sizeof(Char));
     t.Text[text.Length()] = 0;
     t.Transform = position - Context->Origin;
+    t.Transform.Scale.X = scale;
     t.FaceCamera = true;
     t.Size = size;
     t.Color = color;
diff --git a/Source/Engine/Debug/DebugDraw.h b/Source/Engine/Debug/DebugDraw.h
index b37080d0f..8cc5452ed 100644
--- a/Source/Engine/Debug/DebugDraw.h
+++ b/Source/Engine/Debug/DebugDraw.h
@@ -590,7 +590,8 @@ API_CLASS(Static) class FLAXENGINE_API DebugDraw
     /// <param name="color">The color.</param>
     /// <param name="size">The font size.</param>
     /// <param name="duration">The duration (in seconds). Use 0 to draw it only once.</param>
-    API_FUNCTION() static void DrawText(const StringView& text, const Vector3& position, const Color& color, int32 size = 32, float duration = 0.0f);
+    /// <param name="scale">The text scale.</param>
+    API_FUNCTION() static void DrawText(const StringView& text, const Vector3& position, const Color& color, int32 size = 32, float duration = 0.0f, float scale = 1.0f);
 
     /// <summary>
     /// Draws the text (3D).