From caf14e77dbdae26c32b482e34468204eeda8cd21 Mon Sep 17 00:00:00 2001
From: Bastiaan Olij <mux213@gmail.com>
Date: Fri, 16 Nov 2018 22:56:12 +1100
Subject: Adding mikkt tangent support to CSG objects

---
 modules/csg/csg_shape.h | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

(limited to 'modules/csg/csg_shape.h')

diff --git a/modules/csg/csg_shape.h b/modules/csg/csg_shape.h
index 6898cdaf64..0a4bb5f665 100644
--- a/modules/csg/csg_shape.h
+++ b/modules/csg/csg_shape.h
@@ -36,6 +36,7 @@
 #include "csg.h"
 #include "scene/3d/visual_instance.h"
 #include "scene/resources/concave_polygon_shape.h"
+#include "thirdparty/misc/mikktspace.h"
 
 class CSGShape : public VisualInstance {
 	GDCLASS(CSGShape, VisualInstance);
@@ -63,6 +64,8 @@ private:
 	Ref<ConcavePolygonShape> root_collision_shape;
 	RID root_collision_instance;
 
+	bool calculate_tangents;
+
 	Ref<ArrayMesh> root_mesh;
 
 	struct Vector3Hasher {
@@ -78,14 +81,26 @@ private:
 		PoolVector<Vector3> vertices;
 		PoolVector<Vector3> normals;
 		PoolVector<Vector2> uvs;
+		PoolVector<float> tans;
 		Ref<Material> material;
 		int last_added;
 
 		PoolVector<Vector3>::Write verticesw;
 		PoolVector<Vector3>::Write normalsw;
 		PoolVector<Vector2>::Write uvsw;
+		PoolVector<float>::Write tansw;
 	};
 
+	//mikktspace callbacks
+	static int mikktGetNumFaces(const SMikkTSpaceContext *pContext);
+	static int mikktGetNumVerticesOfFace(const SMikkTSpaceContext *pContext, const int iFace);
+	static void mikktGetPosition(const SMikkTSpaceContext *pContext, float fvPosOut[], const int iFace, const int iVert);
+	static void mikktGetNormal(const SMikkTSpaceContext *pContext, float fvNormOut[], const int iFace, const int iVert);
+	static void mikktGetTexCoord(const SMikkTSpaceContext *pContext, float fvTexcOut[], const int iFace, const int iVert);
+	static void mikktSetTSpaceBasic(const SMikkTSpaceContext *pContext, const float fvTangent[], const float fSign, const int iFace, const int iVert);
+	static void mikktSetTSpaceDefault(const SMikkTSpaceContext *pContext, const float fvTangent[], const float fvBiTangent[], const float fMagS, const float fMagT,
+			const tbool bIsOrientationPreserving, const int iFace, const int iVert);
+
 	void _update_shape();
 
 protected:
@@ -115,6 +130,9 @@ public:
 	void set_snap(float p_snap);
 	float get_snap() const;
 
+	void set_calculate_tangents(bool p_calculate_tangents);
+	bool is_calculating_tangents() const;
+
 	bool is_root_shape() const;
 	CSGShape();
 	~CSGShape();
-- 
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