add spherical environment mapping

stepmania/src/Model.cpp

@@ -284,6 +284,8 @@ bool Model::LoadMilkshapeAscii( CString sPath )
                 }
                 strcpy( Material.szName, szName );
 
+				Material.bSphereMapped = ((CString)Material.szName).Find("sphere") != -1;
+
                 // ambient
 			    if( f.GetLine( szLine ) <= 0 )
                 {
@@ -663,6 +665,7 @@ void Model::DrawPrimitives()
 					mat.Specular,
 					mat.fShininess );
 				DISPLAY->SetTexture( mat.aniTexture.GetCurrentTexture() );
+				DISPLAY->SetSphereEnironmentMapping( mat.bSphereMapped );
 			}
 			else
 			{
@@ -678,9 +681,11 @@ void Model::DrawPrimitives()
 					specular,
 					shininess );
 				DISPLAY->SetTexture( NULL );
+				DISPLAY->SetSphereEnironmentMapping( false );
 			}
 
 			DISPLAY->DrawIndexedTriangles( &TempVertices[0], pMesh->Vertices.size(), (Uint16*)&pMesh->Triangles[0], pMesh->Triangles.size()*3 );
+			DISPLAY->SetSphereEnironmentMapping( false );
 		}
 	}
 

stepmania/src/ModelTypes.h

@@ -119,6 +119,7 @@ typedef struct msMaterial
     char        szAlphaTexture[MS_MAX_PATH];	// not used in SM.  Use alpha in diffuse texture instead
     int         nName;	// not used in SM.  What is this for anyway?
 	AnimatedTexture aniTexture;
+	bool		bSphereMapped;	// true of "sphere" appears in the material name
 } msMaterial;
 
 /* msPositionKey */

stepmania/src/RageDisplay.h

@@ -194,6 +194,8 @@ public:
 		RageColor specular, 
 		RageVector3 dir ) = 0;
 
+	virtual void SetSphereEnironmentMapping( bool b ) = 0;
+
 	void DrawQuad( const RageSpriteVertex v[] ) { DrawQuads(v,4); } /* alias. upper-left, upper-right, lower-left, lower-right */
 	virtual void DrawQuads( const RageSpriteVertex v[], int iNumVerts ) = 0;
 	virtual void DrawFan( const RageSpriteVertex v[], int iNumVerts ) = 0;

stepmania/src/RageDisplay_D3D.cpp

@@ -988,6 +988,11 @@ void RageDisplay_D3D::SetMaterial(
 	g_pd3dDevice->SetMaterial( &mat );
 }
 
+// need this?
+//  device->SetRenderState(D3DRENDERSTATE_DIFFUSEMATERIALSOURCE,D3DMCS_MATERIAL);
+//  device->SetRenderState(D3DRENDERSTATE_AMBIENTMATERIALSOURCE,D3DMCS_MATERIAL);
+
+
 void RageDisplay_D3D::SetLighting( bool b )
 {
 	g_pd3dDevice->SetRenderState( D3DRS_LIGHTING, b );
@@ -1170,3 +1175,25 @@ RageMatrix RageDisplay_D3D::GetOrthoMatrix( float l, float r, float b, float t,
 	return m;
 }
 
+void RageDisplay_D3D::SetSphereEnironmentMapping( bool b )
+{
+	// http://www.gamasutra.com/features/20000811/wyatt_03.htm
+
+	if( b )
+	{
+		RageMatrix tex = RageMatrix
+		(
+			0.40f,  0.0f,  0.0f, 0.0f,
+			0.0f,  -0.40f, 0.0f, 0.0f,
+			0.0f,   0.0f,  0.0f, 0.0f,
+			0.50,  -0.50,  0.0f, 1.0f
+		);
+		g_pd3dDevice->SetTransform(D3DTS_TEXTURE0, (D3DMATRIX*)&tex);
+	}
+
+    // Tell D3D to use transformed reflection vectors as texture co-ordinate 0
+    // and then transform this coordinate by the specified texture matrix, also
+    // tell D3D that only the first two coordinates of the output are valid.
+    g_pd3dDevice->SetTextureStageState( 0, D3DTSS_TEXTURETRANSFORMFLAGS, b ? D3DTTFF_COUNT2 : D3DTTFF_DISABLE );    
+    g_pd3dDevice->SetTextureStageState( 0, D3DTSS_TEXCOORDINDEX, b ? D3DTSS_TCI_CAMERASPACEREFLECTIONVECTOR : D3DTSS_TCI_PASSTHRU );    
+}

stepmania/src/RageDisplay_D3D.h

@@ -68,6 +68,8 @@ public:
 		RageColor specular, 
 		RageVector3 dir );
 
+	void SetSphereEnironmentMapping( bool b );
+
 	void DrawQuads( const RageSpriteVertex v[], int iNumVerts );
 	void DrawFan( const RageSpriteVertex v[], int iNumVerts );
 	void DrawStrip( const RageSpriteVertex v[], int iNumVerts );

stepmania/src/RageDisplay_OGL.cpp

@@ -1440,3 +1440,19 @@ bool RageDisplay_OGL::SupportsTextureFormat( PixelFormat pixfmt, bool realtime )
 		return true;
 	}
 }
+
+void RageDisplay_OGL::SetSphereEnironmentMapping( bool b )
+{
+	if( b )
+	{
+		glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_SPHERE_MAP);
+		glTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_SPHERE_MAP);
+		glEnable(GL_TEXTURE_GEN_S);
+		glEnable(GL_TEXTURE_GEN_T);
+	}
+	else
+	{
+		glDisable(GL_TEXTURE_GEN_S);
+		glDisable(GL_TEXTURE_GEN_T);
+	}
+}

stepmania/src/RageDisplay_OGL.h

@@ -54,6 +54,8 @@ public:
 		RageColor specular, 
 		RageVector3 dir );
 
+	void SetSphereEnironmentMapping( bool b );
+
 	void DrawQuads( const RageSpriteVertex v[], int iNumVerts );
 	void DrawFan( const RageSpriteVertex v[], int iNumVerts );
 	void DrawStrip( const RageSpriteVertex v[], int iNumVerts );