public override void Draw()
{
if (Mat != null && Mat.Shader != null)
{
GLShaderProgram shader = Mat.Shader;
GL.ActiveTexture(TextureUnit.Texture0);
if (Mat.Albedo != null)
{
Mat.Albedo.Bind();
}
GL.ActiveTexture(TextureUnit.Texture1);
if (Mat.Metallic != null)
{
Mat.Metallic.Bind();
}
GL.ActiveTexture(TextureUnit.Texture2);
if (Mat.Roughness != null)
{
Mat.Roughness.Bind();
}
GL.ActiveTexture(TextureUnit.Texture3);
if (Mat.Occlusion != null)
{
Mat.Occlusion.Bind();
}
GL.ActiveTexture(TextureUnit.Texture4);
if (Mat.Normal != null)
{
Mat.Normal.Bind();
}
GL.ActiveTexture(TextureUnit.Texture5);
if (Mat.Height != null)
{
Mat.Height.Bind();
}
GL.ActiveTexture(TextureUnit.Texture6);
PBRMaterial.BRDFLut.Bind();
GL.ActiveTexture(TextureUnit.Texture7);
if (IrradianceMap != null)
{
IrradianceMap.Bind();
}
GL.ActiveTexture(TextureUnit.Texture8);
if (PrefilterMap != null)
{
PrefilterMap.Bind();
}
//use shader
shader.Use();
//set texture bind points
shader.SetUniform("albedo", 0);
shader.SetUniform("metallicMap", 1);
shader.SetUniform("roughnessMap", 2);
shader.SetUniform("occlusionMap", 3);
shader.SetUniform("normalMap", 4);
shader.SetUniform("heightMap", 5);
shader.SetUniform("brdfLUT", 6);
shader.SetUniform("irradianceMap", 7);
shader.SetUniform("prefilterMap", 8);
Vector3 lpos = LightPosition;
Vector3 lc = LightColor;
Vector3 cam = CameraPosition;
//set camera and light stuff
shader.SetUniform3("cameraPosition", ref cam);
shader.SetUniform3("lightPosition", ref lpos);
shader.SetUniform3("lightColor", ref lc);
//setup MVP and N matrices
Matrix4 proj = Projection;
Matrix4 view = View;
Matrix4 m = Model;
Matrix4 norm = Matrix4.Invert(m);
norm.Transpose();
shader.SetUniformMatrix4("projectionMatrix", ref proj);
shader.SetUniformMatrix4("viewMatrix", ref view);
shader.SetUniformMatrix4("modelMatrix", ref m);
shader.SetUniformMatrix4("normalMatrix", ref norm);
Vector2 tiling = Tiling;
shader.SetUniform2("tiling", ref tiling);
///draw
vao.Bind();
GL.DrawElements(BeginMode.Triangles, indicesCount, DrawElementsType.UnsignedInt, 0);
GLVertexArray.Unbind();
GLTextuer2D.Unbind();
}
}
public virtual void DrawFull()
{
if (Mat != null && Mat.Shader != null)
{
IGLProgram shader = Mat.Shader;
IGL.Primary.ActiveTexture((int)TextureUnit.Texture0);
if (Mat.Albedo != null)
{
Mat.Albedo.Bind();
}
IGL.Primary.ActiveTexture((int)TextureUnit.Texture1);
if (Mat.Metallic != null)
{
Mat.Metallic.Bind();
}
IGL.Primary.ActiveTexture((int)TextureUnit.Texture2);
if (Mat.Roughness != null)
{
Mat.Roughness.Bind();
}
IGL.Primary.ActiveTexture((int)TextureUnit.Texture3);
if (Mat.Occlusion != null)
{
Mat.Occlusion.Bind();
}
IGL.Primary.ActiveTexture((int)TextureUnit.Texture4);
if (Mat.Normal != null)
{
Mat.Normal.Bind();
}
IGL.Primary.ActiveTexture((int)TextureUnit.Texture5);
if (Mat.Height != null)
{
Mat.Height.Bind();
}
IGL.Primary.ActiveTexture((int)TextureUnit.Texture6);
PBRMaterial.BRDFLut.Bind();
IGL.Primary.ActiveTexture((int)TextureUnit.Texture7);
if (IrradianceMap != null)
{
IrradianceMap.Bind();
}
IGL.Primary.ActiveTexture((int)TextureUnit.Texture8);
if (PrefilterMap != null)
{
PrefilterMap.Bind();
}
IGL.Primary.ActiveTexture((int)TextureUnit.Texture9);
if (Mat.Thickness != null)
{
Mat.Thickness.Bind();
}
IGL.Primary.ActiveTexture((int)TextureUnit.Texture10);
if (Mat.Emission != null)
{
Mat.Emission.Bind();
}
//use shader
shader.Use();
//set texture bind points
shader.SetUniform("albedo", 0);
shader.SetUniform("metallicMap", 1);
shader.SetUniform("roughnessMap", 2);
shader.SetUniform("occlusionMap", 3);
shader.SetUniform("normalMap", 4);
shader.SetUniform("heightMap", 5);
shader.SetUniform("brdfLUT", 6);
shader.SetUniform("irradianceMap", 7);
shader.SetUniform("prefilterMap", 8);
shader.SetUniform("thicknessMap", 9);
shader.SetUniform("emissionMap", 10);
Vector3 lpos = LightPosition;
Vector3 lc = LightColor;
Vector3 cam = CameraPosition;
//set camera and light stuff
shader.SetUniform3("cameraPosition", ref cam);
shader.SetUniform3("lightPosition", ref lpos);
shader.SetUniform3("lightColor", ref lc);
shader.SetUniform("lightPower", LightPower);
//setup MVP and N matrices
Matrix4 proj = Projection;
Matrix4 view = View;
Matrix4 m = Model;
Matrix4 norm = Matrix4.Invert(m);
norm.Transpose();
shader.SetUniformMatrix4("projectionMatrix", ref proj);
shader.SetUniformMatrix4("viewMatrix", ref view);
shader.SetUniformMatrix4("modelMatrix", ref m);
shader.SetUniformMatrix4("normalMatrix", ref norm);
shader.SetUniform("far", Far);
shader.SetUniform("near", Near);
shader.SetUniform("heightScale", Mat.HeightScale);
shader.SetUniform("refraction", Mat.IOR);
///SSS Related
shader.SetUniform("SSS_Distortion", Mat.SSSDistortion);
shader.SetUniform("SSS_Ambient", Mat.SSSAmbient);
shader.SetUniform("SSS_Power", Mat.SSSPower);
if (Mat.ClipHeight)
{
shader.SetUniform("occlusionClipBias", Mat.ClipHeightBias);
}
else
{
shader.SetUniform("occlusionClipBias", -1.0f);
}
shader.SetUniform("displace", Mat.UseDisplacement);
Vector2 tiling = Tiling;
shader.SetUniform2("tiling", ref tiling);
///draw
vao.Bind();
if (Mat.UseDisplacement)
{
IGL.Primary.DrawElements((int)BeginMode.Patches, indicesCount, (int)DrawElementsType.UnsignedInt, 0);
}
else
{
IGL.Primary.DrawElements((int)BeginMode.Triangles, indicesCount, (int)DrawElementsType.UnsignedInt, 0);
}
GLVertexArray.Unbind();
GLTextuer2D.Unbind();
}
}
