public void InitializeSystem()
{
// Create a Default camera
m_editorCamera = new Camera();
m_editorCamera.ClearColor = new Color(0.4f, 0.1f, 1f, 1f);
EditorCameraMovement camMovement = new EditorCameraMovement();
camMovement.Camera = m_editorCamera;
m_world.RegisterComponent(camMovement);
m_cameraList.Add(m_editorCamera);
// Create a shader for drawing debug primitives/instances.
m_debugShader = new Shader("DebugPrimitives");
m_debugShader.CompileSource(File.ReadAllText("RenderSystem/Shaders/DebugPrimitive.frag"), ShaderType.FragmentShader);
m_debugShader.CompileSource(File.ReadAllText("RenderSystem/Shaders/DebugPrimitive.vert"), ShaderType.VertexShader);
m_debugShader.LinkShader();
}
private void DrawMap(Camera camera)
{
if (m_world.Map == null)
return;
Matrix4 viewMatrix = camera.ViewMatrix;
Matrix4 projMatrix = camera.ProjectionMatrix;
foreach (Room room in m_world.Map.Rooms)
{
if (!room.Visible)
continue;
DrawScene(room);
foreach (Mesh mesh in room.MeshList)
{
if (mesh == null)
continue;
// Build a model matrix to draw this mesh at that takes the Room's MULT into account.
Matrix4 finalMatrix = Matrix4.CreateFromQuaternion(room.Rotation) * Matrix4.CreateTranslation(room.Translation);
DrawMesh(mesh, camera, finalMatrix);
}
}
if (m_world.Map.Stage != null)
{
if (m_world.Map.Stage.Visible)
{
DrawScene(m_world.Map.Stage);
foreach (Mesh mesh in m_world.Map.Stage.MeshList)
{
if (mesh != null)
DrawMesh(mesh, camera, Matrix4.Identity);
}
}
}
}
private void DrawMesh(Mesh mesh, Camera camera, Matrix4 additionalMatrix)
{
if (mesh == null)
return;
Matrix4 viewMatrix = camera.ViewMatrix;
Matrix4 projMatrix = camera.ProjectionMatrix;
foreach (var batch in mesh.SubMeshes)
{
// Bind the shader
if (batch.Material != null)
{
if (batch.Material.Shader != null)
batch.Material.Shader.Bind();
}
// ToDo: Get the model's position in the world from the entity it belongs to and create a model matrix from that.
Matrix4 modelMatrix = additionalMatrix;
// Before we draw it, we're going to do something incredibly stupid, and try to add bone support.
Matrix4[] boneTransforms = new Matrix4[mesh.Skeleton.Count];
for (int i = 0; i < mesh.Skeleton.Count; i++)
{
SkeletonBone bone = mesh.Skeleton[i];
Matrix4 cumulativeTransform = Matrix4.Identity;
while (bone != null)
{
cumulativeTransform = cumulativeTransform * Matrix4.CreateScale(bone.Scale) * Matrix4.CreateFromQuaternion(bone.Rotation) * Matrix4.CreateTranslation(bone.Translation);
bone = bone.Parent;
}
boneTransforms[i] = cumulativeTransform;
}
// Each boneCopy is now in it's final position, so we can apply that to the vertexes based on their bone weighting.
// However, vertex positions have already been uploaded once, so we're uh... going to hack it and re-upload them.
Vector3[] origVerts = batch.Vertices;
Vector3[] vertices = new Vector3[origVerts.Length];
Array.Copy(origVerts, vertices, origVerts.Length);
for (int v = 0; v < vertices.Length; v++)
{
BoneWeight weights = batch.BoneWeights[v];
Matrix4 finalMatrix = Matrix4.Zero;
for (int w = 0; w < weights.BoneIndexes.Length; w++)
{
Matrix4 boneInfluence = boneTransforms[weights.BoneIndexes[w]];
float weight = weights.BoneWeights[w];
finalMatrix = (boneInfluence * weight) + finalMatrix;
}
vertices[v] = Vector3.TransformPosition(vertices[v], finalMatrix);
}
// Now re-assign our Vertices to the mesh so they get uploaded to the GPU...
batch.Vertices = vertices;
// Bind the VAOs currently associated with this Mesh
batch.Bind();
// Bind our Textures
GL.ActiveTexture(TextureUnit.Texture0);
if (batch.Material.Textures[0] != null)
batch.Material.Textures[0].Bind();
// Upload uniforms to the GPU
GL.UniformMatrix4(batch.Material.Shader.UniformModelMtx, false, ref modelMatrix);
GL.UniformMatrix4(batch.Material.Shader.UniformViewMtx, false, ref viewMatrix);
GL.UniformMatrix4(batch.Material.Shader.UniformProjMtx, false, ref projMatrix);
// Set our Blend, Cull, Depth and Dither states. Alpha Compare is
// done in the pixel shader due to Nintendo having advanced AC options.
GX2OpenGL.SetBlendState(batch.Material.BlendMode);
GX2OpenGL.SetCullState(batch.Material.CullMode);
GX2OpenGL.SetDepthState(batch.Material.ZMode);
GX2OpenGL.SetDitherState(batch.Material.Dither);
// Draw our Mesh.
GL.DrawElements(batch.PrimitveType, batch.Indexes.Length, DrawElementsType.UnsignedInt, 0);
// Unbind the VAOs so that our VAO doesn't leak into the next drawcall.
batch.Unbind();
// And finally restore our 'source' vertex positions
batch.Vertices = origVerts;
}
}
private void DrawDebugShapes(Camera camera)
{
Matrix4 viewMatrix = camera.ViewMatrix;
Matrix4 projMatrix = camera.ProjectionMatrix;
GL.Enable(EnableCap.DepthTest);
GL.CullFace(CullFaceMode.Back);
GL.Enable(EnableCap.CullFace);
GL.DepthMask(true);
foreach (var instance in m_world.Gizmos.GetInstanceList())
{
if (instance.DepthTest)
GL.Enable(EnableCap.DepthTest);
else
GL.Disable(EnableCap.DepthTest);
Matrix4 modelMatrix = Matrix4.CreateScale(instance.Scale) * Matrix4.CreateTranslation(instance.Position);
// Bind the Debug Shader
m_debugShader.Bind();
// Upload uniforms to GPU
GL.UniformMatrix4(m_debugShader.UniformModelMtx, false, ref modelMatrix);
GL.UniformMatrix4(m_debugShader.UniformViewMtx, false, ref viewMatrix);
GL.UniformMatrix4(m_debugShader.UniformProjMtx, false, ref projMatrix);
// Set the Color uniform on the GPU
GL.Uniform4(m_debugShader.UniformColor0Amb, instance.Color.R, instance.Color.G, instance.Color.B, instance.Color.A);
// Bind our Mesh
instance.Mesh.SubMeshes[0].Bind();
// Draw our Mesh.
GL.DrawElements(instance.Mesh.SubMeshes[0].PrimitveType, instance.Mesh.SubMeshes[0].Indexes.Length, DrawElementsType.UnsignedInt, 0);
// Unbind the VAOs so that our VAO doesn't leak into the next drawcall.
instance.Mesh.SubMeshes[0].Unbind();
}
}