hopefully working implementation of mpfNoSelect from this discussion: http://glest.org/glest_board/index.php?topic=8165.msg82932#msg82932

source/shared_lib/include/graphics/gl/model_renderer_gl.h

@@ -34,7 +34,7 @@ public:
 	ModelRendererGl();
 	virtual void begin(bool renderNormals, bool renderTextures, bool renderColors, MeshCallback *meshCallback);
 	virtual void end();
-	virtual void render(Model *model);
+	virtual void render(Model *model,int renderMode=rmNormal);
 	virtual void renderNormalsOnly(Model *model);
 
 	void setDuplicateTexCoords(bool duplicateTexCoords)			{this->duplicateTexCoords= duplicateTexCoords;}
@@ -42,7 +42,7 @@ public:
 
 private:
 	
-	void renderMesh(Mesh *mesh);
+	void renderMesh(Mesh *mesh,int renderMode=rmNormal);
 	void renderMeshNormals(Mesh *mesh);
 };
 

source/shared_lib/include/graphics/model.h

@@ -70,6 +70,7 @@ private:
 	//properties
 	bool twoSided;
 	bool customColor;
+	bool noSelect;
 
 	uint32 textureFlags;
 
@@ -123,6 +124,7 @@ public:
 	//properties
 	bool getTwoSided() const		{return twoSided;}
 	bool getCustomTexture() const	{return customColor;}
+	bool getNoSelect() const		{return noSelect;}
 
 	//external data
 	const InterpolationData *getInterpolationData() const	{return interpolationData;}

source/shared_lib/include/graphics/model_header.h

@@ -42,7 +42,8 @@ enum ModelType{
 
 enum MeshPropertyFlag{
 	mpfCustomColor= 1,
-	mpfTwoSided= 2
+	mpfTwoSided= 2,
+	mpfNoSelect= 4
 };
 
 enum MeshTexture{

source/shared_lib/include/graphics/model_renderer.h

@@ -18,6 +18,14 @@
 
 namespace Shared{ namespace Graphics{
 
+enum RenderMode{
+	rmNormal,
+	rmSelection,
+
+	renderModeCount
+};
+
+
 class Texture;
 
 // =====================================================
@@ -50,7 +58,7 @@ public:
 
 	virtual void begin(bool renderNormals, bool renderTextures, bool renderColors, MeshCallback *meshCallback= NULL)=0;
 	virtual void end()=0;
-	virtual void render(Model *model)=0;
+	virtual void render(Model *model,int renderMode=rmNormal)=0;
 	virtual void renderNormalsOnly(Model *model)=0;
 };
 

source/shared_lib/sources/graphics/gl/model_renderer_gl.cpp

@@ -103,7 +103,7 @@ void ModelRendererGl::end() {
 	assertGl();
 }
 
-void ModelRendererGl::render(Model *model) {
+void ModelRendererGl::render(Model *model,int renderMode) {
 	//assertions
 	assert(rendering);
 	assertGl();
@@ -138,8 +138,12 @@ void ModelRendererGl::renderNormalsOnly(Model *model) {
 
 // ===================== PRIVATE =======================
 
-void ModelRendererGl::renderMesh(Mesh *mesh) {
+void ModelRendererGl::renderMesh(Mesh *mesh,int renderMode) {
 
+	if(renderMode==rmSelection && mesh->getNoSelect()==true)
+	{// don't render this and do nothing
+		return;
+	}
 	//assertions
 	assertGl();
 

source/shared_lib/sources/graphics/model.cpp

@@ -62,6 +62,7 @@ Mesh::Mesh() {
 
 	twoSided= false;
 	customColor= false;
+	noSelect= false;
 
 	textureFlags=0;
 
@@ -242,6 +243,7 @@ void Mesh::loadV2(int meshIndex, const string &dir, FILE *f, TextureManager *tex
 	//misc
 	twoSided= false;
 	customColor= false;
+	noSelect= false;
 
 	if(SystemFlags::VERBOSE_MODE_ENABLED) printf("Load v2, this = %p Found meshHeader.hasTexture = %d, texName [%s] mtDiffuse = %d meshIndex = %d\n",this,meshHeader.hasTexture,toLower(reinterpret_cast<char*>(meshHeader.texName)).c_str(),mtDiffuse,meshIndex);
 
@@ -327,6 +329,7 @@ void Mesh::loadV3(int meshIndex, const string &dir, FILE *f,
 	//misc
 	twoSided= (meshHeader.properties & mp3TwoSided) != 0;
 	customColor= (meshHeader.properties & mp3CustomColor) != 0;
+	noSelect = false;
 
 	textureFlags= 0;
 	if((meshHeader.properties & mp3NoTexture) != mp3NoTexture) {
@@ -464,6 +467,7 @@ void Mesh::load(int meshIndex, const string &dir, FILE *f, TextureManager *textu
 	//properties
 	customColor= (meshHeader.properties & mpfCustomColor) != 0;
 	twoSided= (meshHeader.properties & mpfTwoSided) != 0;
+	noSelect= (meshHeader.properties & mpfNoSelect) != 0;
 
 	//material
 	diffuseColor= Vec3f(meshHeader.diffuseColor);
@@ -537,6 +541,9 @@ void Mesh::save(int meshIndex, const string &dir, FILE *f, TextureManager *textu
 	if(twoSided) {
 		meshHeader.properties |= mpfTwoSided;
 	}
+	if(noSelect) {
+		meshHeader.properties |= mpfNoSelect;
+	}
 
 	meshHeader.textures = textureFlags;
 	fwrite(&meshHeader, sizeof(MeshHeader), 1, f);