public override void ApplyMaterial(Mesh mesh, Material mat, bool textured, bool shaded)
{
ShaderGen.GenFlags flags = 0;
if (textured)
{
flags |= ShaderGen.GenFlags.ColorMap;
}
if (shaded)
{
flags |= ShaderGen.GenFlags.Lighting;
}
Shader shader = _shaderGen.GenerateOrGetFromCache(flags);
shader.BindIfNecessary();
}
public override void ApplyMaterial(Mesh mesh, Material mat, bool textured, bool shaded, bool twoSided)
{
RenderControl.GLError("StartMaterialMapper");
ShaderGen.GenFlags flags = 0;
var hasAlpha = false;
var hasTexture = false;
// note: keep this up-to-date with the code in MaterialMapper.UploadTextures()
for (int i = 0; i < Renderer.modernGLUsedTextureTypeCount; i++)
{
TextureType currTextureType = (TextureType)((int)TextureType.Diffuse + i);
GL.ActiveTexture((TextureUnit)((int)TextureUnit.Texture0 + i));
GL.BindTexture(TextureTarget.Texture2D, Renderer.modernGLTextureType[i]); //we use own texture always, even when textures off to supply preset values
if (textured && mat.GetMaterialTextureCount(currTextureType) > 0)
{
hasTexture = true;
//flags |= ShaderGen.GenFlags.Texture; flag not used, we always have some texture
TextureSlot tex;
mat.GetMaterialTexture(currTextureType, 0, out tex);
var gtex = _scene.TextureSet.GetOriginalOrReplacement(tex.FilePath);
hasAlpha = hasAlpha || gtex.HasAlpha == Texture.AlphaState.HasAlpha;
if (gtex.State == Texture.TextureState.GlTextureCreated)
{
gtex.BindGlTexture();
}
}
}
GL.ActiveTexture(TextureUnit.Texture0);
RenderControl.GLError("EndTextureSettings");
if (shaded)
{
flags |= ShaderGen.GenFlags.Lighting;
}
var hasColors = mesh != null && mesh.HasVertexColors(0);
if (hasColors)
{
flags |= ShaderGen.GenFlags.VertexColor;
}
if (_UseSceneLights)
{
flags |= ShaderGen.GenFlags.PhongSpecularShading;
}
if ((mat.IsTwoSided) || (twoSided))
{
flags |= ShaderGen.GenFlags.TwoSide;
}
Shader shader = _shaderGen.GenerateOrGetFromCache(flags, _LightCount > 0 ? _LightCount : 1);
shader.BindIfNecessary();
Matrix4 curView = Matrix4.CreateScale(_scene.Scale) * _View;
shader.SetMat4("WorldViewProjection", _World * curView * _Perspective);
Matrix4 cameraPos = _View.ClearRotation();
Matrix4 cameraRotation = _View.ClearTranslation();
Matrix4 cam = Matrix4.Identity;
cam = cameraPos * cameraRotation;
Vector3 cameraPosition = -cam.ExtractTranslation() / _scene.Scale;//does not work for orbitcontroller
// cameraPosition = new Vector3(200,100,-100); //1m = 100units and positive
cameraPosition.Z = -cameraPosition.Z;
shader.SetVec3("CameraPosition", -cameraPosition);
shader.SetMat4("World", _World);
shader.SetMat4("WorldView", _World * curView); //_world* curView keeps light source at "fixed" position during rotating of the model
shader.SetFloat("SceneBrightness", _SceneBrightness);
shader.SetFloat("Material.diffuse", 0);
shader.SetFloat("Material.ambient", 1);
shader.SetFloat("Material.specular", 2);
shader.SetFloat("Material.emissive", 3);
shader.SetFloat("Material.height", 4);
shader.SetFloat("Material.normal", 5);
shader.SetLights(_GLLights, _LightCount);
RenderControl.GLError("UniformSettings");
// note: keep semantics of hasAlpha consistent with IsAlphaMaterial()
var alpha = 1.0f;
if (mat.HasOpacity)
{
alpha = mat.Opacity;
if (alpha < AlphaSuppressionThreshold) // suppress zero opacity, this is likely wrong input data
{
alpha = 1.0f;
}
}
var color = new Color4(.8f, .8f, .8f, 1.0f);
if (mat.HasColorDiffuse)
{
color = AssimpToOpenTk.FromColor(mat.ColorDiffuse);
if (color.A < AlphaSuppressionThreshold) // s.a.
{
color.A = 1.0f;
}
}
color.A *= alpha;
hasAlpha = hasAlpha || color.A < 1.0f;
if (shaded)
{
// if the material has a texture but the diffuse color texture is all black,
// then heuristically assume that this is an import/export flaw and substitute
// white.
if (hasTexture && color.R < 1e-3f && color.G < 1e-3f && color.B < 1e-3f)
{
color = Color4.White;
}
shader.SetCol4("MaterialDiffuse_Alpha", color);
color = new Color4(0, 0, 0, 1.0f);
if (mat.HasColorSpecular)
{
color = AssimpToOpenTk.FromColor(mat.ColorSpecular);
}
shader.SetCol4("MaterialSpecular", color);
color = new Color4(.2f, .2f, .2f, 1.0f);
if (mat.HasColorAmbient)
{
color = AssimpToOpenTk.FromColor(mat.ColorAmbient);
}
shader.SetCol4("MaterialAmbient", color);
color = new Color4(0, 0, 0, 1.0f);
if (mat.HasColorEmissive)
{
color = AssimpToOpenTk.FromColor(mat.ColorEmissive);
}
shader.SetCol4("MaterialEmissive", color);
float shininess = 1;
float strength = 1;
if (mat.HasShininess)
{
shininess = mat.Shininess;
}
// todo: I don't even remember how shininess strength was supposed to be handled in assimp .. Scales the specular color of the material.Not implemented here.
if (mat.HasShininessStrength)
{
strength = mat.ShininessStrength;
}
var exp = shininess;
if (exp >= 128.0f) // 128 is the maximum exponent as per the Gl spec
{
exp = 128.0f;
}
shader.SetFloat("MaterialShininess", exp);
//Shininess may be at mat.ColorSpecular.a too..?? but in FBX is
}
else if (!hasColors)
{
shader.SetCol4("MaterialDiffuse_Alpha", color);
}
if (hasAlpha)
{
GL.Enable(EnableCap.Blend);
GL.BlendFuncSeparate(BlendingFactorSrc.SrcAlpha, BlendingFactorDest.OneMinusSrcAlpha, BlendingFactorSrc.SrcAlpha, BlendingFactorDest.One);
GL.DepthMask(false);
}
else
{
GL.DepthMask(true);
GL.Disable(EnableCap.Blend);
}
RenderControl.GLError("EndMaterialMapper");
}
