/// <summary> /// Indicates whether the current object is equal to another object of the same type. /// </summary> /// <param name="other"> /// A <see cref="GraphicsState"/> to compare to this GraphicsState. /// </param> /// <returns> /// It returns true if the current object is equal to <paramref name="other"/>. /// </returns> /// <remarks> /// <para> /// This method test only whether <paramref name="other"/> type equals to this type. /// </para> /// </remarks> /// <exception cref="ArgumentNullException"> /// This exception is thrown if the parameter <paramref name="other"/> is null. /// </exception> public override bool Equals(IGraphicsState other) { if (base.Equals(other) == false) { return(false); } Debug.Assert(other is CullFaceState); CullFaceState otherState = (CullFaceState)other; if (otherState._FrontFaceMode != _FrontFaceMode) { return(false); } if (otherState._Enabled != _Enabled) { return(false); } if (otherState._CulledFace != _CulledFace) { return(false); } return(true); }
/// <summary> /// Merge this state with another one. /// </summary> /// <param name="state"> /// A <see cref="IGraphicsState"/> having the same <see cref="StateIdentifier"/> of this state. /// </param> public override void Merge(IGraphicsState state) { if (state == null) { throw new ArgumentNullException("state"); } CullFaceState otherState = state as CullFaceState; if (otherState == null) { throw new ArgumentException("not a CullFaceState", "state"); } _FrontFaceMode = otherState._FrontFaceMode; _Enabled = otherState._Enabled; _CulledFace = otherState._CulledFace; }
/// <summary> /// Set ShaderProgram state. /// </summary> /// <param name="ctx"> /// A <see cref="GraphicsContext"/> which has defined the shader program <paramref name="program"/>. /// </param> /// <param name="program"> /// The <see cref="ShaderProgram"/> which has the state set. /// </param> public override void Apply(GraphicsContext ctx, ShaderProgram program) { if (ctx == null) { throw new ArgumentNullException("ctx"); } CullFaceState currentState = (CullFaceState)ctx.GetCurrentState(StateIndex); if (currentState != null) { ApplyStateCore(ctx, program, currentState); } else { ApplyStateCore(ctx, program); } ctx.SetCurrentState(this); }
private void ApplyStateCore(GraphicsContext ctx, ShaderProgram program, CullFaceState currentState) { if (ctx == null) { throw new ArgumentNullException("ctx"); } // Front face determination if (currentState.FrontFaceMode != FrontFaceMode) { Gl.FrontFace(FrontFaceMode); } // Culling if (_Enabled) { // Face culling if (currentState._Enabled == false) { Gl.Enable(EnableCap.CullFace); } // Culled face if (currentState.CulledFace != CulledFace) { Gl.CullFace(CulledFace); } } else { //No face culling if (currentState._Enabled == true) { Gl.Disable(EnableCap.CullFace); } } }