From d8bca0d935bd572e94af28c2cbce249e2602e134 Mon Sep 17 00:00:00 2001
From: Vadim Lopatin <coolreader.org@gmail.com>
Date: Mon, 4 Apr 2016 17:00:35 +0300
Subject: [PATCH] lookAt

---
 examples/d3d/src/d3d.d                 |  5 +++--
 src/dlangui/graphics/scene/transform.d | 10 ++++++++++
 2 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/examples/d3d/src/d3d.d b/examples/d3d/src/d3d.d
index a7392712..732375a1 100644
--- a/examples/d3d/src/d3d.d
+++ b/examples/d3d/src/d3d.d
@@ -115,8 +115,9 @@ class UiWidget : VerticalLayout, CellVisitor {
         _scene.activeCamera = _cam;
 
         Node3d dirLightNode = new Node3d();
-        dirLightNode.rotateY(-15);
-        dirLightNode.rotateX(20);
+        dirLightNode.lookAt(vec3(-5, -5, -5), vec3(0, 0, 0), vec3(0, 1, 0));
+        //dirLightNode.rotateY(-15);
+        //dirLightNode.rotateX(20);
         dirLightNode.light = Light.createDirectional(vec3(1, 0.5, 0.5));
         _scene.addChild(dirLightNode);
 
diff --git a/src/dlangui/graphics/scene/transform.d b/src/dlangui/graphics/scene/transform.d
index 826cf746..9d1aec38 100644
--- a/src/dlangui/graphics/scene/transform.d
+++ b/src/dlangui/graphics/scene/transform.d
@@ -116,4 +116,14 @@ class Transform : RefCountedObject {
         }
         return _matrix;
     }
+
+    @property void matrix(ref const(mat4) m) {
+        _matrix = m;
+        _dirtyTransform = false;
+    }
+
+    void lookAt(const vec3 eye, const vec3 center, const vec3 up) {
+        _matrix.lookAt(eye, center, up);
+        _dirtyTransform = false;
+    }
 }