From 94898b4d9d3d6a05d534a7fb33a16893b81d3d03 Mon Sep 17 00:00:00 2001
From: maelstrom <maelstrom@maelstrom.dev>
Date: Mon, 14 Apr 2025 23:53:42 +0200
Subject: [PATCH] fix(outline): make outline cling to edges rather than stretch

---
 assets/shaders/outline.vs       | 7 ++++++-
 core/src/rendering/renderer.cpp | 4 ++--
 2 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/assets/shaders/outline.vs b/assets/shaders/outline.vs
index 6dcb3ff..e3eeb5b 100644
--- a/assets/shaders/outline.vs
+++ b/assets/shaders/outline.vs
@@ -8,9 +8,14 @@ out vec3 vPos;
 uniform mat4 model;
 uniform mat4 view;
 uniform mat4 projection;
+uniform vec3 scale;
 
 void main()
 {
-    gl_Position = projection * view * model * vec4(aPos, 1.0);
+    float thickness = 0.4;
+    vec3 distFromEdge = sign(aPos) * 0.5 - aPos;
+    vec3 tVec = (scale * sign(aPos) * 0.5 - distFromEdge * thickness) / scale;
+
+    gl_Position = projection * view * model * vec4(tVec, 1);
     vPos = aPos;
 }
diff --git a/core/src/rendering/renderer.cpp b/core/src/rendering/renderer.cpp
index 26121a2..1332ddb 100644
--- a/core/src/rendering/renderer.cpp
+++ b/core/src/rendering/renderer.cpp
@@ -385,9 +385,9 @@ void renderOutlines() {
         if (!part->selected) continue;
 
         glm::mat4 model = part->cframe;
-        model = glm::scale(model, (glm::vec3)part->size + glm::vec3(0.01));
+        model = glm::scale(model, (glm::vec3)part->size + glm::vec3(0.2));
         outlineShader->set("model", model);
-        outlineShader->set("scale", part->size + glm::vec3(0.01));
+        outlineShader->set("scale", part->size + glm::vec3(0.1));
 
         OUTLINE_MESH->bind();
         glDrawArrays(GL_TRIANGLES, 0, OUTLINE_MESH->vertexCount);