From eec6b8e4030fdf766e28df546cda2bc0c01ce51c Mon Sep 17 00:00:00 2001
From: Vsevolod Kremianskii <vkremianskii@gmail.com>
Date: Sat, 15 May 2021 11:45:03 +0700
Subject: [PATCH] Reimplement AABB debugging

---
 src/engine/graphics/mesh/meshes.cpp | 16 ++++++++--------
 src/engine/scene/scenegraph.cpp     | 17 +++++++++++++++++
 2 files changed, 25 insertions(+), 8 deletions(-)

diff --git a/src/engine/graphics/mesh/meshes.cpp b/src/engine/graphics/mesh/meshes.cpp
index 14a8b8c7..457f60fd 100644
--- a/src/engine/graphics/mesh/meshes.cpp
+++ b/src/engine/graphics/mesh/meshes.cpp
@@ -181,14 +181,14 @@ static const VertexAttributes g_cubemapAttributes { 8 * sizeof(float), 0, 3 * si
 // AABB
 
 static const vector<float> g_aabbVertices = {
-    -0.5f, -0.5f, -0.5f,
-    -0.5f, -0.5f,  0.5f,
-    -0.5f,  0.5f,  0.5f,
-    -0.5f,  0.5f, -0.5f,
-     0.5f,  0.5f,  0.5f,
-     0.5f,  0.5f, -0.5f,
-     0.5f, -0.5f, -0.5f,
-     0.5f, -0.5f,  0.5f
+    -0.5f, -0.5f, 0.0f,
+    -0.5f, -0.5f, 1.0f,
+    -0.5f,  0.5f, 1.0f,
+    -0.5f,  0.5f, 0.0f,
+     0.5f,  0.5f, 1.0f,
+     0.5f,  0.5f, 0.0f,
+     0.5f, -0.5f, 0.0f,
+     0.5f, -0.5f, 1.0f
 };
 
 static const vector<uint16_t> g_aabbIndices = {
diff --git a/src/engine/scene/scenegraph.cpp b/src/engine/scene/scenegraph.cpp
index dadfd3bc..03c727ad 100644
--- a/src/engine/scene/scenegraph.cpp
+++ b/src/engine/scene/scenegraph.cpp
@@ -19,6 +19,8 @@
 
 #include <algorithm>
 
+#include "glm/gtx/transform.hpp"
+
 #include "../graphics/mesh/meshes.h"
 
 #include "node/cameranode.h"
@@ -38,6 +40,8 @@ namespace scene {
 
 static constexpr float kMaxGrassDistance = 16.0f;
 
+static const bool g_debugAABB = false;
+
 SceneGraph::SceneGraph(const GraphicsOptions &opts) : _opts(opts) {
 }
 
@@ -312,6 +316,19 @@ void SceneGraph::draw(bool shadowPass) {
         mesh->drawSingle(false);
     }
 
+    if (g_debugAABB) {
+        for (auto &root : _roots) {
+            glm::mat4 transform(root->absoluteTransform());
+            transform *= glm::scale(root->aabb().getSize());
+
+            ShaderUniforms uniforms(_uniformsPrototype);
+            uniforms.combined.general.model = move(transform);
+
+            Shaders::instance().activate(ShaderProgram::SimpleColor, uniforms);
+            Meshes::instance().getAABB()->draw();
+        }
+    }
+
     // Render transparent meshes
     for (auto &mesh : _transparentMeshes) {
         mesh->drawSingle(false);