private void CheckValidity()
{
if (state.HasFlag(ShaderProgramState.ShadersChanged))
{
// we need to recompile shaders
RecompileShaders();
ResetUniforms();
RebufferVertices();
}
else
{
if (state.HasFlag(ShaderProgramState.UniformsChanged))
{
// reset uniforms
ResetUniforms();
}
if (state.HasFlag(ShaderProgramState.VerticesChanged))
{
// reset vertex buffers
RebufferVertices();
}
}
state = ShaderProgramState.Valid;
}
/// <summary>
/// Is called when vertex collection changes (uniform added, removed, etc.).
/// </summary>
private void OnVertexCollectionChange(
object sender,
System.Collections.Specialized.NotifyCollectionChangedEventArgs e)
{
switch (e.Action)
{
case System.Collections.Specialized.NotifyCollectionChangedAction.Add:
case System.Collections.Specialized.NotifyCollectionChangedAction.Replace:
case System.Collections.Specialized.NotifyCollectionChangedAction.Move:
// Have new elements in collection notify this class when they get changed.
// Also ensure that new vertices will have all the already defined attributes.
foreach (var obj in e.NewItems)
{
Vertex vertex = (Vertex)obj;
vertex.PropertyChanged += OnVertexChange;
foreach (AttributeInfo attributeInfo in AttributeInfos.Values)
{
if (vertex.Attributes.ContainsKey(attributeInfo.Id) == false)
{
vertex.Attributes.Add(attributeInfo.Id, attributeInfo.CreateNewVariable());
}
vertex.Attributes[attributeInfo.Id].PropertyChanged += OnVertexChange;
}
}
break;
}
state |= ShaderProgramState.VerticesChanged;
}
// ==================================================================================================
// OTHER
// ==================================================================================================
public Core()
{
state |= ShaderProgramState.ShadersChanged;
state |= ShaderProgramState.UniformsChanged;
state |= ShaderProgramState.VerticesChanged;
Uniforms = new ObservableCollection <Uniform>();
_Vertices = new ObservableCollection <Vertex>();
_AttributeInfos = new Dictionary <string, AttributeInfo>();
Uniforms.CollectionChanged += OnUniformCollectionChange;
Vertices.CollectionChanged += OnVertexCollectionChange;
ClearColor = new Vec3f()
{
X = 0.1f, Y = 0.1f, Z = 0.1f
};
}
/// <summary>
/// Is called when uniform collection changes (uniform added, removed, etc.).
/// </summary>
private void OnUniformCollectionChange(
object sender,
System.Collections.Specialized.NotifyCollectionChangedEventArgs e)
{
switch (e.Action)
{
case System.Collections.Specialized.NotifyCollectionChangedAction.Add:
case System.Collections.Specialized.NotifyCollectionChangedAction.Replace:
case System.Collections.Specialized.NotifyCollectionChangedAction.Move:
// Have new elements in collection notify this class when they get changed.
foreach (var obj in e.NewItems)
{
Uniform uniform = (Uniform)obj;
uniform.PropertyChanged += OnUniformChange;
uniform.Variable.PropertyChanged += OnUniformChange;
}
break;
}
state |= ShaderProgramState.UniformsChanged;
}
/// <summary>
/// Is called when single attribute variable changes in some way.
/// </summary>
private void OnAttributeChange(object sender, System.ComponentModel.PropertyChangedEventArgs e)
{
state |= ShaderProgramState.VerticesChanged;
}
// ==================================================================================================
// HANDLING CHANGES
// ==================================================================================================
/// <summary>
/// Is called when single uniform changes in some way.
/// </summary>
private void OnUniformChange(object sender, System.ComponentModel.PropertyChangedEventArgs e)
{
state |= ShaderProgramState.UniformsChanged;
}
