private void _renderSetupGLSL(SSRenderConfig renderConfig, SSMainShaderProgram shaderPgm, SSMeshOBJSubsetData subset)
{
// Step 1: setup GL rendering modes...
// GL.Enable(EnableCap.Lighting);
// GL.Enable(EnableCap.Blend);
// GL.BlendFunc(BlendingFactorSrc.SrcAlpha, BlendingFactorDest.OneMinusSrcAlpha);
// GL.PixelStore(PixelStoreParameter.UnpackAlignment, 1);
// Step 2: setup our material mode and paramaters...
if (renderConfig.drawingShadowMap)
{
// assume SSObject.Render has setup our materials properly for the shadowmap Pass
// TODO: find a better way to do this!
return;
}
if (shaderPgm == null)
{
SSShaderProgram.DeactivateAll();
// fixed function single-texture
if (subset.TextureMaterial.diffuseTex != null)
{
GL.ActiveTexture(TextureUnit.Texture0);
GL.Enable(EnableCap.Texture2D);
GL.BindTexture(TextureTarget.Texture2D, subset.TextureMaterial.diffuseTex.TextureID);
}
}
else
{
shaderPgm.Activate();
shaderPgm.SetupTextures(subset.TextureMaterial);
}
}
private void _renderSendVBOTriangles(SSRenderConfig renderConfig, SSMeshOBJSubsetData subset)
{
subset.ibo.DrawElements(renderConfig, PrimitiveType.Triangles);
}
private void _renderSendVBOTriangles(SSRenderConfig renderConfig, SSMeshOBJSubsetData subset)
{
subset.triangleMesh.drawSingle(renderConfig, PrimitiveType.Triangles);
}
private void _renderSendVBOTriangles(SSRenderConfig renderConfig, SSMeshOBJSubsetData subset)
{
subset.triangleMesh.drawSingle(renderConfig, PrimitiveType.Triangles);
}
private void _renderSetupGLSL(SSRenderConfig renderConfig, SSMainShaderProgram shaderPgm, SSMeshOBJSubsetData subset)
{
// Step 1: setup GL rendering modes...
// GL.Enable(EnableCap.Lighting);
// GL.Enable(EnableCap.Blend);
// GL.BlendFunc(BlendingFactorSrc.SrcAlpha, BlendingFactorDest.OneMinusSrcAlpha);
// GL.PixelStore(PixelStoreParameter.UnpackAlignment, 1);
// Step 2: setup our material mode and paramaters...
if (renderConfig.drawingShadowMap) {
// assume SSObject.Render has setup our materials properly for the shadowmap Pass
// TODO: find a better way to do this!
return;
}
if (shaderPgm == null) {
SSShaderProgram.DeactivateAll ();
// fixed function single-texture
if (subset.TextureMaterial.diffuseTex != null) {
GL.ActiveTexture(TextureUnit.Texture0);
GL.Enable(EnableCap.Texture2D);
GL.BindTexture(TextureTarget.Texture2D, subset.TextureMaterial.diffuseTex.TextureID);
}
} else {
shaderPgm.Activate();
shaderPgm.SetupTextures(subset.TextureMaterial);
}
}
private void _renderSendVBOLines(SSRenderConfig renderConfig, SSMeshOBJSubsetData subset)
{
// TODO: this currently has classic problems with z-fighting between the model and the wireframe
// it is customary to "bump" the wireframe slightly towards the camera to prevent this.
GL.LineWidth(1.5f);
GL.Color4(0.8f, 0.5f, 0.5f, 0.5f);
subset.wireframeMesh.drawSingle(renderConfig, PrimitiveType.Lines);
}
private void _renderSendTriangles(SSMeshOBJSubsetData subset)
{
// Step 3: draw faces.. here we use the "old school" manual method of drawing
// note: programs written for modern OpenGL & D3D don't do this!
// instead, they hand the vertex-buffer and index-buffer to the
// GPU and let it do this..
GL.Begin(PrimitiveType.Triangles);
foreach(var idx in subset.triangleMesh.lastAssignedIndices) {
var vertex = subset.triangleMesh.lastAssignedVertices[idx]; // retrieve the vertex
// draw the vertex..
GL.Color3(System.Drawing.Color.FromArgb(vertex.DiffuseColor));
GL.TexCoord2(vertex.TexCoord.X, vertex.TexCoord.Y);
GL.Normal3(vertex.Normal);
GL.Vertex3(vertex.Position);
}
GL.End();
}
private void _renderSendLines(SSMeshOBJSubsetData subset)
{
// Step 3: draw faces.. here we use the "old school" manual method of drawing
// note: programs written for modern OpenGL & D3D don't do this!
// instead, they hand the vertex-buffer and index-buffer to the
// GPU and let it do this..
var indices = subset.wireframeMesh.lastAssignedIndices;
for(int i=0; i<indices.Length; i+=3) {
var v1 = subset.wireframeMesh.lastAssignedVertices [indices[i]];
var v2 = subset.wireframeMesh.lastAssignedVertices [indices[i+1]];
var v3 = subset.wireframeMesh.lastAssignedVertices [indices[i+2]];
// draw the vertex..
GL.Color3(System.Drawing.Color.FromArgb(v1.DiffuseColor));
GL.Begin(PrimitiveType.LineLoop);
GL.Vertex3 (v1.Position);
GL.Vertex3 (v2.Position);
GL.Vertex3 (v3.Position);
GL.End();
}
}
private SSMeshOBJSubsetData _loadMaterialSubset(SSAssetManager.Context ctx, WavefrontObjLoader wff,
WavefrontObjLoader.MaterialInfoWithFaces objMatSubset)
{
// generate renderable geometry data...
SSVertex_PosNormTexDiff[] vertices;
UInt16[] triIndices, wireframeIndices;
VertexSoup_VertexFormatBinder.generateDrawIndexBuffer(
wff, out triIndices, out vertices);
wireframeIndices = OpenTKHelper.generateLineIndicies (triIndices);
SSMeshOBJSubsetData subsetData = new SSMeshOBJSubsetData(
vertices, triIndices, wireframeIndices);
// setup the material...
// load and link every texture present
subsetData.TextureMaterial = new SSTextureMaterial();
if (objMatSubset.mtl.diffuseTextureResourceName != null) {
subsetData.TextureMaterial.diffuseTex = SSAssetManager.GetInstance<SSTexture>(ctx, objMatSubset.mtl.diffuseTextureResourceName);
}
if (objMatSubset.mtl.ambientTextureResourceName != null) {
subsetData.TextureMaterial.ambientTex = SSAssetManager.GetInstance<SSTexture>(ctx, objMatSubset.mtl.ambientTextureResourceName);
}
if (objMatSubset.mtl.bumpTextureResourceName != null) {
subsetData.TextureMaterial.bumpMapTex = SSAssetManager.GetInstance<SSTexture>(ctx, objMatSubset.mtl.bumpTextureResourceName);
}
if (objMatSubset.mtl.specularTextureResourceName != null) {
subsetData.TextureMaterial.specularTex = SSAssetManager.GetInstance<SSTexture>(ctx, objMatSubset.mtl.specularTextureResourceName);
}
return subsetData;
}
private void _renderSetupGLSL(ref SSRenderConfig renderConfig, SSMeshOBJSubsetData subset)
{
// Step 1: setup GL rendering modes...
GL.Enable(EnableCap.CullFace);
// GL.Enable(EnableCap.Lighting);
// GL.Enable(EnableCap.Blend);
// GL.BlendFunc(BlendingFactorSrc.SrcAlpha, BlendingFactorDest.OneMinusSrcAlpha);
// GL.PixelStore(PixelStoreParameter.UnpackAlignment, 1);
// Step 2: setup our material mode and paramaters...
GL.Color3(System.Drawing.Color.White); // clear the vertex color to white..
SSMainShaderProgram shaderPgm = renderConfig.BaseShader;
if (renderConfig.drawingShadowMap)
{
// assume SSObject.Render has setup our materials properly for the shadowmap Pass
// TODO: find a better way to do this!
return;
}
if (shaderPgm == null)
{
SSShaderProgram.DeactivateAll();
GL.Disable(EnableCap.CullFace);
// fixed function single-texture
GL.Disable(EnableCap.Texture2D);
if (subset.diffuseTexture != null)
{
GL.ActiveTexture(TextureUnit.Texture0);
GL.Enable(EnableCap.Texture2D);
GL.BindTexture(TextureTarget.Texture2D, subset.diffuseTexture.TextureID);
}
}
else
{
// activate GLSL shader
shaderPgm.Activate();
// bind our texture-images to GL texture-units
// http://adriangame.blogspot.com/2010/05/glsl-multitexture-checklist.html
// these texture-unit assignments are hard-coded in the shader setup
GL.ActiveTexture(TextureUnit.Texture0);
if (subset.diffuseTexture != null)
{
GL.BindTexture(TextureTarget.Texture2D, subset.diffuseTexture.TextureID);
shaderPgm.u_DiffTexEnabled = true;
}
else
{
GL.BindTexture(TextureTarget.Texture2D, 0);
shaderPgm.u_DiffTexEnabled = false;
}
GL.ActiveTexture(TextureUnit.Texture1);
if (subset.specularTexture != null)
{
GL.BindTexture(TextureTarget.Texture2D, subset.specularTexture.TextureID);
shaderPgm.u_SpecTexEnabled = true;
}
else
{
GL.BindTexture(TextureTarget.Texture2D, 0);
shaderPgm.u_SpecTexEnabled = false;
}
GL.ActiveTexture(TextureUnit.Texture2);
if (subset.ambientTexture != null)
{
GL.BindTexture(TextureTarget.Texture2D, subset.ambientTexture.TextureID);
shaderPgm.u_AmbTexEnabled = true;
}
else
{
GL.BindTexture(TextureTarget.Texture2D, 0);
shaderPgm.u_AmbTexEnabled = false;
}
GL.ActiveTexture(TextureUnit.Texture3);
if (subset.bumpTexture != null)
{
GL.BindTexture(TextureTarget.Texture2D, subset.bumpTexture.TextureID);
shaderPgm.u_BumpTexEnabled = true;
}
else
{
GL.BindTexture(TextureTarget.Texture2D, 0);
shaderPgm.u_BumpTexEnabled = false;
}
// reset to texture-unit 0 to be friendly..
GL.ActiveTexture(TextureUnit.Texture0);
}
}
