From 27ec21aa7eb198b1fdeb5e3e01711da3fdf41e15 Mon Sep 17 00:00:00 2001
From: minerjr <minerjrminerjr@hotmail.com>
Date: Wed, 5 Mar 2025 09:04:16 -0400
Subject: [PATCH] Added invers aspect ratio

Added inverse aspect ratio for use with face virtual textures.
---
 indra/llmath/llcamera.cpp | 11 +++++++++++
 indra/llmath/llcamera.h   |  7 +++++++
 2 files changed, 18 insertions(+)

diff --git a/indra/llmath/llcamera.cpp b/indra/llmath/llcamera.cpp
index 3daed2ac31..988d600486 100644
--- a/indra/llmath/llcamera.cpp
+++ b/indra/llmath/llcamera.cpp
@@ -35,6 +35,9 @@ LLCamera::LLCamera() :
     LLCoordFrame(),
     mView(DEFAULT_FIELD_OF_VIEW),
     mAspect(DEFAULT_ASPECT_RATIO),
+    // <FS:minerjr> [FIRE-35081] Blurry prims not changing with graphics settings, not happening with SL Viewer
+    mInverseAspect(1.0f / DEFAULT_ASPECT_RATIO),
+    // </FS:minerjr> [FIRE-35081]
     mViewHeightInPixels( -1 ),          // invalid height
     mNearPlane(DEFAULT_NEAR_PLANE),
     mFarPlane(DEFAULT_FAR_PLANE),
@@ -63,6 +66,10 @@ LLCamera::LLCamera(F32 vertical_fov_rads, F32 aspect_ratio, S32 view_height_in_p
     }
 
     mAspect = llclamp(aspect_ratio, MIN_ASPECT_RATIO, MAX_ASPECT_RATIO);
+    // <FS:minerjr> [FIRE-35081] Blurry prims not changing with graphics settings, not happening with SL Viewer
+    // Store the inverse of the aspect ratio, so we can remove it from texture calculations
+    mInverseAspect = 1.0f / mAspect;
+    // </FS:minerjr> [FIRE-35081]
     mNearPlane = llclamp(near_plane, MIN_NEAR_PLANE, MAX_NEAR_PLANE);
     if(far_plane < 0) far_plane = DEFAULT_FAR_PLANE;
     mFarPlane = llclamp(far_plane, MIN_FAR_PLANE, MAX_FAR_PLANE);
@@ -129,6 +136,10 @@ void LLCamera::setViewHeightInPixels(S32 height)
 void LLCamera::setAspect(F32 aspect_ratio)
 {
     mAspect = llclamp(aspect_ratio, MIN_ASPECT_RATIO, MAX_ASPECT_RATIO);
+    // <FS:minerjr> [FIRE-35081] Blurry prims not changing with graphics settings, not happening with SL Viewer
+    // Store the inverse of the aspect ratio, so we can remove it from texture calculations
+    mInverseAspect = 1.0f / mAspect;
+    // </FS:minerjr> [FIRE-35081]
     calculateFrustumPlanes();
 }
 
diff --git a/indra/llmath/llcamera.h b/indra/llmath/llcamera.h
index b6e0e4a2be..8155573263 100644
--- a/indra/llmath/llcamera.h
+++ b/indra/llmath/llcamera.h
@@ -127,6 +127,10 @@ private:
 
     F32 mView;                  // angle between top and bottom frustum planes in radians.
     F32 mAspect;                // width/height
+    // <FS:minerjr> [FIRE-35081] Blurry prims not changing with graphics settings, not happening with SL Viewer
+    // Store the inverse of the aspect ratio, for the texture's sizes
+    F32 mInverseAspect;         // height/width
+    // </FS:minerjr> [FIRE-35081]
     S32 mViewHeightInPixels;    // for ViewHeightInPixels() only
     F32 mNearPlane;
     F32 mFarPlane;
@@ -161,6 +165,9 @@ public:
     F32 getView() const                         { return mView; }               // vertical FOV in radians
     S32 getViewHeightInPixels() const           { return mViewHeightInPixels; }
     F32 getAspect() const                       { return mAspect; }             // width / height
+    // <FS:minerjr> [FIRE-35081] Blurry prims not changing with graphics settings, not happening with SL Viewer
+    F32 getInverseAspect() const                { return mInverseAspect; }      // width / height
+    // </FS:minerjr> [FIRE-35081]
     F32 getNear() const                         { return mNearPlane; }          // meters
     F32 getFar() const                          { return mFarPlane; }           // meters