- Fixed blending issues in example no. 08 (OpenGL driver).

- Added ECFN_DISABLED value (it works like ECFN_NEVER worked before) and changed ECFN_NEVER behaviour (it works like its equivalent value in OpenGL/Direct3D).

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@4424 dfc29bdd-3216-0410-991c-e03cc46cb475

include/SMaterial.h

@@ -61,8 +61,8 @@ namespace video
 	//! Comparison function, e.g. for depth buffer test
 	enum E_COMPARISON_FUNC
 	{
-		//! Test never succeeds, this equals disable
-		ECFN_NEVER=0,
+		//! Depth test disabled (disable also write to depth buffer)
+		ECFN_DISABLED=0,
 		//! <= test, default for e.g. depth test
 		ECFN_LESSEQUAL=1,
 		//! Exact equality
@@ -76,7 +76,9 @@ namespace video
 		//! inverse of <=
 		ECFN_GREATER,
 		//! test succeeds always
-		ECFN_ALWAYS
+		ECFN_ALWAYS,
+		//! Test never succeeds
+		ECFN_NEVER
 	};
 
 	//! Enum values for enabling/disabling color planes for rendering
@@ -362,7 +364,9 @@ namespace video
 		f32 Thickness;
 
 		//! Is the ZBuffer enabled? Default: ECFN_LESSEQUAL
-		/** Values are from E_COMPARISON_FUNC. */
+		/** If you want to disable depth test for this material
+		just set this parameter to ECFN_DISABLED.
+		Values are from E_COMPARISON_FUNC. */
 		u8 ZBuffer;
 
 		//! Sets the antialiasing mode
@@ -418,7 +422,8 @@ namespace video
 		//! Is the zbuffer writeable or is it read-only. Default: true.
 		/** This flag is forced to false if the MaterialType is a
 		transparent type and the scene parameter
-		ALLOW_ZWRITE_ON_TRANSPARENT is not set. */
+		ALLOW_ZWRITE_ON_TRANSPARENT is not set. If you set this parameter
+		to true, make sure that ZBuffer value is other than ECFN_DISABLED */
 		bool ZWriteEnable:1;
 
 		//! Is backface culling enabled? Default: true
@@ -579,7 +584,7 @@ namespace video
 				case EMF_LIGHTING:
 					return Lighting;
 				case EMF_ZBUFFER:
-					return ZBuffer!=ECFN_NEVER;
+					return ZBuffer!=ECFN_DISABLED;
 				case EMF_ZWRITE_ENABLE:
 					return ZWriteEnable;
 				case EMF_BACK_FACE_CULLING:

source/Irrlicht/CAnimatedMeshSceneNode.cpp

@@ -368,7 +368,7 @@ void CAnimatedMeshSceneNode::render()
 			}
 		}
 
-		debug_mat.ZBuffer = video::ECFN_NEVER;
+		debug_mat.ZBuffer = video::ECFN_DISABLED;
 		debug_mat.Lighting = false;
 		driver->setMaterial(debug_mat);
 
@@ -448,7 +448,7 @@ void CAnimatedMeshSceneNode::render()
 		{
 			debug_mat.Lighting = false;
 			debug_mat.Wireframe = true;
-			debug_mat.ZBuffer = video::ECFN_NEVER;
+			debug_mat.ZBuffer = video::ECFN_DISABLED;
 			driver->setMaterial(debug_mat);
 
 			for (u32 g=0; g<m->getMeshBufferCount(); ++g)

source/Irrlicht/CBurningShader_Raster_Reference.cpp

@@ -625,7 +625,7 @@ void CBurningShader_Raster_Reference::setMaterial ( const SBurningShaderMaterial
 	ShaderParam.SetRenderState( BD3DRS_SPECULARMATERIALSOURCE, (m.ColorMaterial==ECM_SPECULAR)?BD3DMCS_COLOR1:BD3DMCS_MATERIAL);
 
 	// depth buffer enable and compare
-	ShaderParam.SetRenderState( BD3DRS_ZENABLE, (material.org.ZBuffer==video::ECFN_NEVER) ? BD3DZB_FALSE : BD3DZB_USEW);
+	ShaderParam.SetRenderState( BD3DRS_ZENABLE, (material.org.ZBuffer==video::ECFN_DISABLED) ? BD3DZB_FALSE : BD3DZB_USEW);
 	switch (material.org.ZBuffer)
 	{
 	case ECFN_NEVER:

source/Irrlicht/CD3D8Driver.cpp

@@ -1490,7 +1490,7 @@ void CD3D8Driver::setBasicRenderStates(const SMaterial& material, const SMateria
 	{
 		switch (material.ZBuffer)
 		{
-		case ECFN_NEVER:
+		case ECFN_DISABLED:
 			pID3DDevice->SetRenderState(D3DRS_ZENABLE, FALSE);
 			break;
 		case ECFN_LESSEQUAL:
@@ -1521,6 +1521,10 @@ void CD3D8Driver::setBasicRenderStates(const SMaterial& material, const SMateria
 			pID3DDevice->SetRenderState(D3DRS_ZENABLE, TRUE);
 			pID3DDevice->SetRenderState(D3DRS_ZFUNC, D3DCMP_ALWAYS);
 			break;
+		case ECFN_NEVER:
+			pID3DDevice->SetRenderState(D3DRS_ZENABLE, TRUE);
+			pID3DDevice->SetRenderState(D3DRS_ZFUNC, D3DCMP_NEVER);
+			break;
 		}
 	}
 

source/Irrlicht/CD3D9Driver.cpp

@@ -2202,7 +2202,7 @@ void CD3D9Driver::setBasicRenderStates(const SMaterial& material, const SMateria
 	{
 		switch (material.ZBuffer)
 		{
-		case ECFN_NEVER:
+		case ECFN_DISABLED:
 			pID3DDevice->SetRenderState(D3DRS_ZENABLE, FALSE);
 			break;
 		case ECFN_LESSEQUAL:
@@ -2233,6 +2233,9 @@ void CD3D9Driver::setBasicRenderStates(const SMaterial& material, const SMateria
 			pID3DDevice->SetRenderState(D3DRS_ZENABLE, TRUE);
 			pID3DDevice->SetRenderState(D3DRS_ZFUNC, D3DCMP_ALWAYS);
 			break;
+		case ECFN_NEVER:
+			pID3DDevice->SetRenderState(D3DRS_ZENABLE, TRUE);
+			pID3DDevice->SetRenderState(D3DRS_ZFUNC, D3DCMP_NEVER);
 		}
 	}
 

source/Irrlicht/CNullDriver.cpp

@@ -190,7 +190,7 @@ CNullDriver::CNullDriver(io::IFileSystem* io, const core::dimension2d<u32>& scre
 	InitMaterial2D.AntiAliasing=video::EAAM_OFF;
 	InitMaterial2D.Lighting=false;
 	InitMaterial2D.ZWriteEnable=false;
-	InitMaterial2D.ZBuffer=video::ECFN_NEVER;
+	InitMaterial2D.ZBuffer=video::ECFN_DISABLED;
 	InitMaterial2D.UseMipMaps=false;
 	for (u32 i=0; i<video::MATERIAL_MAX_TEXTURES; ++i)
 	{

source/Irrlicht/COgreMeshFileLoader.cpp

@@ -993,7 +993,7 @@ void COgreMeshFileLoader::readPass(io::IReadFile* file, OgreTechnique& technique
 		{
 			getMaterialToken(file, token);
 			if (token!="on")
-				pass.Material.ZBuffer=video::ECFN_NEVER;
+				pass.Material.ZBuffer=video::ECFN_DISABLED;
 		}
 		else if (token=="depth_write")
 		{

source/Irrlicht/COpenGLDriver.cpp

@@ -2990,30 +2990,41 @@ void COpenGLDriver::setBasicRenderStates(const SMaterial& material, const SMater
 	{
 		switch (material.ZBuffer)
 		{
-			case ECFN_NEVER:
-                BridgeCalls->setDepthFunc(0);
+			case ECFN_DISABLED:
+                BridgeCalls->setDepthTest(false);
 				break;
 			case ECFN_LESSEQUAL:
+				BridgeCalls->setDepthTest(true);
                 BridgeCalls->setDepthFunc(GL_LEQUAL);
 				break;
 			case ECFN_EQUAL:
+				BridgeCalls->setDepthTest(true);
                 BridgeCalls->setDepthFunc(GL_EQUAL);
 				break;
 			case ECFN_LESS:
+				BridgeCalls->setDepthTest(true);
                 BridgeCalls->setDepthFunc(GL_LESS);
 				break;
 			case ECFN_NOTEQUAL:
+				BridgeCalls->setDepthTest(true);
                 BridgeCalls->setDepthFunc(GL_NOTEQUAL);
 				break;
 			case ECFN_GREATEREQUAL:
+				BridgeCalls->setDepthTest(true);
                 BridgeCalls->setDepthFunc(GL_GEQUAL);
 				break;
 			case ECFN_GREATER:
+				BridgeCalls->setDepthTest(true);
                 BridgeCalls->setDepthFunc(GL_GREATER);
 				break;
 			case ECFN_ALWAYS:
+				BridgeCalls->setDepthTest(true);
                 BridgeCalls->setDepthFunc(GL_ALWAYS);
 				break;
+			case ECFN_NEVER:
+				BridgeCalls->setDepthTest(true);
+                BridgeCalls->setDepthFunc(GL_NEVER);
+				break;
 		}
 	}
 
@@ -3787,8 +3798,9 @@ void COpenGLDriver::drawStencilShadowVolume(const core::array<core::vector3df>&
 
 	glDisable(GL_LIGHTING);
 	glDisable(GL_FOG);
-    BridgeCalls->setDepthFunc(GL_LESS);
-    BridgeCalls->setDepthMask(false);
+	glEnable(GL_DEPTH_TEST);
+    glDepthFunc(GL_LESS);
+    glDepthMask(GL_FALSE);
 
 	if (debugDataVisible & scene::EDS_MESH_WIRE_OVERLAY)
 		glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
@@ -3918,7 +3930,7 @@ void COpenGLDriver::drawStencilShadow(bool clearStencilBuffer, video::SColor lef
 
 	glDisable(GL_LIGHTING);
 	glDisable(GL_FOG);
-    BridgeCalls->setDepthMask(false);
+    glDepthMask(GL_FALSE);
 
 	glShadeModel(GL_FLAT);
 	glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
@@ -4987,17 +4999,21 @@ const CGcontext& COpenGLDriver::getCgContext()
     
 COpenGLCallBridge::COpenGLCallBridge(COpenGLDriver* driver) : Driver(driver),
 	ClientStateVertex(false), ClientStateNormal(false), ClientStateColor(false), ClientStateTexCoord0(false),
-    DepthMask(false), DepthFunc(0), DepthTest(false), MatrixMode(GL_MODELVIEW),
+    DepthFunc(GL_LESS), DepthMask(true), DepthTest(false), MatrixMode(GL_MODELVIEW),
     ActiveTexture(GL_TEXTURE0_ARB), ClientActiveTexture(GL_TEXTURE0_ARB)
 {
+	// Initial OpenGL values from specification.
+
     for (u32 i = 0; i < MATERIAL_MAX_TEXTURES; ++i)
     {
         Texture[i] = 0;
         TextureFixedPipeline[i] = true;
     }
     
-    glDepthMask(GL_FALSE);
+	glDepthFunc(GL_LESS);
+    glDepthMask(GL_TRUE);
     glDisable(GL_DEPTH_TEST);
+
     glMatrixMode(GL_MODELVIEW);
     
     if(Driver->MultiTextureExtension)
@@ -5058,44 +5074,40 @@ void COpenGLCallBridge::setClientState(bool vertex, bool normal, bool color, boo
 		ClientStateTexCoord0 = texCoord0;
 	}
 }
+
+void COpenGLCallBridge::setDepthFunc(GLenum mode)
+{
+    if(DepthFunc != mode)
+    {
+		glDepthFunc(mode);
+                
+        DepthFunc = mode;
+    }
+}
         
-void COpenGLCallBridge::setDepthMask(bool enabled)
+void COpenGLCallBridge::setDepthMask(bool enable)
 {
-    if(DepthMask != enabled)
+    if(DepthMask != enable)
     {
-        if (enabled)
+        if (enable)
             glDepthMask(GL_TRUE);
         else
             glDepthMask(GL_FALSE);
                 
-        DepthMask = enabled;
+        DepthMask = enable;
     }
 }
-        
-void COpenGLCallBridge::setDepthFunc(GLenum mode)
+
+void COpenGLCallBridge::setDepthTest(bool enable)
 {
-    if(DepthFunc != mode)
+    if(DepthTest != enable)
     {
-        if(mode == 0)
-        {
-            if(DepthTest)
-            {
-                glDisable(GL_DEPTH_TEST);
-                DepthTest = false;
-            }
-        }
+        if (enable)
+            glEnable(GL_DEPTH_TEST);
         else
-        {
-            if(!DepthTest)
-            {
-                glEnable(GL_DEPTH_TEST);
-                DepthTest = true;
-            }
-                    
-            glDepthFunc(mode);
-        }
+            glDisable(GL_DEPTH_TEST);
                 
-        DepthFunc = mode;
+        DepthTest = enable;
     }
 }
         

source/Irrlicht/COpenGLDriver.h

@@ -643,9 +643,11 @@ namespace video
         
         // Depth calls.
 
-        void setDepthMask(bool enabled);
-        
-        void setDepthFunc(GLenum mode);
+		void setDepthFunc(GLenum mode);
+
+        void setDepthMask(bool enable);
+
+		void setDepthTest(bool enable);
         
         // Matrix calls.
         
@@ -667,8 +669,8 @@ namespace video
 		bool ClientStateColor;
 		bool ClientStateTexCoord0;
         
+		GLenum DepthFunc;
         bool DepthMask;
-        GLenum DepthFunc;
         bool DepthTest;
         
         GLenum MatrixMode;

source/Irrlicht/CSkyBoxSceneNode.cpp

@@ -38,7 +38,7 @@ CSkyBoxSceneNode::CSkyBoxSceneNode(video::ITexture* top, video::ITexture* bottom
 
 	video::SMaterial mat;
 	mat.Lighting = false;
-	mat.ZBuffer = video::ECFN_NEVER;
+	mat.ZBuffer = video::ECFN_DISABLED;
 	mat.ZWriteEnable = false;
 	mat.AntiAliasing=0;
 	mat.TextureLayer[0].TextureWrapU = video::ETC_CLAMP_TO_EDGE;

source/Irrlicht/CSkyDomeSceneNode.cpp

@@ -46,7 +46,7 @@ CSkyDomeSceneNode::CSkyDomeSceneNode(video::ITexture* sky, u32 horiRes, u32 vert
 
 	Buffer = new SMeshBuffer();
 	Buffer->Material.Lighting = false;
-	Buffer->Material.ZBuffer = video::ECFN_NEVER;
+	Buffer->Material.ZBuffer = video::ECFN_DISABLED;
 	Buffer->Material.ZWriteEnable = false;
 	Buffer->Material.AntiAliasing = video::EAAM_OFF;
 	Buffer->Material.setTexture(0, sky);

source/Irrlicht/CSoftwareDriver.cpp

@@ -139,7 +139,7 @@ void CSoftwareDriver::selectRightTriangleRenderer()
 					renderer = ETR_TEXTURE_GOURAUD_ADD;
 				}
 				else
-				if ((Material.ZBuffer==ECFN_NEVER) && !Material.ZWriteEnable)
+				if ((Material.ZBuffer==ECFN_DISABLED) && !Material.ZWriteEnable)
 					renderer = ETR_TEXTURE_GOURAUD_NOZ;
 				else
 				{

source/Irrlicht/CSoftwareDriver2.cpp

@@ -484,7 +484,7 @@ void CBurningVideoDriver::setCurrentShader()
 	ITexture *texture0 = Material.org.getTexture(0);
 	ITexture *texture1 = Material.org.getTexture(1);
 
-	bool zMaterialTest =	Material.org.ZBuffer != ECFN_NEVER &&
+	bool zMaterialTest =	Material.org.ZBuffer != ECFN_DISABLED &&
 							Material.org.ZWriteEnable &&
 							( AllowZWriteOnTransparent || !Material.org.isTransparent() );