From: Mikko Rasa <tdb@tdb.fi>
Date: Tue, 15 Mar 2011 06:47:41 +0000 (+0000)
Subject: Support exporting separate arrays in mesh2c (as opposed to interleaved)
X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=commitdiff_plain;h=9a9d3517dcfdba5206d9c73ce211feac8e402bc2

Support exporting separate arrays in mesh2c (as opposed to interleaved)
---

diff --git a/mesh2c.cpp b/mesh2c.cpp
index c15b829e..170799c9 100644
--- a/mesh2c.cpp
+++ b/mesh2c.cpp
@@ -24,9 +24,11 @@ int main(int argc, char **argv)
 {
 	string prefix;
 	bool render_func = false;
+	bool separate_arrays = false;
 	GetOpt getopt;
 	getopt.add_option('p', "prefix",      prefix,      GetOpt::REQUIRED_ARG);
 	getopt.add_option('r', "render-func", render_func, GetOpt::NO_ARG);
+	getopt.add_option('s', "separate-arrays", separate_arrays, GetOpt::NO_ARG);
 	getopt(argc, argv);
 
 	const vector<string> &args = getopt.get_args();
@@ -37,22 +39,69 @@ int main(int argc, char **argv)
 	}
 
 	GL::Mesh mesh;
+	mesh.use_buffers(false);
 	DataFile::load(mesh, args[0]);
 
 	IO::print("/* Exported from %s */\n", args[0]);
 
 	const GL::VertexArray &array = mesh.get_vertices();
 	const GL::VertexFormat &fmt = array.get_format();
-	IO::print("float %svertex_data[] =\n{", prefix);
 	unsigned stride = fmt.stride();
-	for(unsigned i=0; i<array.size(); ++i)
+	if(separate_arrays)
 	{
-		const float *ptr = array[i];
-		IO::print("\n\t");
-		for(unsigned j=0; j<stride; ++j)
-			IO::print("%g, ", ptr[j]);
+		unsigned offset = 0;
+		for(const unsigned char *i=fmt.begin(); i!=fmt.end(); ++i)
+		{
+			unsigned kind = (*i)>>2;
+			unsigned size = ((*i)&3)+1;
+			string name;
+			switch(kind)
+			{
+			case 0:
+				name = "vertex";
+				break;
+			case 1:
+				name = "normal";
+				break;
+			case 2:
+				name = "color";
+				break;
+			case 3:
+				name = "texcoord";
+				break;
+			default:
+				if(kind<11)
+					name = format("texcoord%d", kind-3);
+				else
+					name = format("attrib%d", kind-11);
+				break;
+			}
+
+			IO::print("float %s%s_data[] =\n{", prefix, name);
+			for(unsigned j=0; j<array.size(); ++j)
+			{
+				const float *ptr = array[j]+offset;
+				IO::print("\n\t");
+				for(unsigned k=0; k<size; ++k)
+					IO::print("%g, ", ptr[k]);
+			}
+			IO::print("\n};\n\n");
+
+			offset += size;
+		}
+	}
+	else
+	{
+		IO::print("float %svertex_data[] =\n{", prefix);
+		for(unsigned i=0; i<array.size(); ++i)
+		{
+			const float *ptr = array[i];
+			IO::print("\n\t");
+			for(unsigned j=0; j<stride; ++j)
+				IO::print("%g, ", ptr[j]);
+		}
+		IO::print("\n};\n\n");
 	}
-	IO::print("\n};\n\n");
 
 	const char **type = 0;
 	if(array.size()<0x100)
@@ -84,32 +133,55 @@ int main(int argc, char **argv)
 	{
 		unsigned kind = (*i)>>2;
 		unsigned size = ((*i)&3)+1;
+		string source = format("%svertex_data+%d", prefix, offset);
 		switch((*i)>>2)
 		{
 		case 0:
-			IO::print("\tglVertexPointer(%d, GL_FLOAT, %d*sizeof(float), %svertex_data+%d);\n",
-				size, stride, prefix, offset);
+			if(separate_arrays)
+				source = prefix+"vertex_data";
+			IO::print("\tglVertexPointer(%d, GL_FLOAT, %d*sizeof(float), %s);\n",
+				size, stride, source);
 			IO::print("\tglEnableClientState(GL_VERTEX_ARRAY);\n");
 			break;
 		case 1:
-			IO::print("\tglNormalPointer(GL_FLOAT, %d*sizeof(float), %svertex_data+%d);\n",
-				stride, prefix, offset);
+			if(separate_arrays)
+				source = prefix+"normal_data";
+			IO::print("\tglNormalPointer(GL_FLOAT, %d*sizeof(float), %s);\n",
+				stride, source);
 			IO::print("\tglEnableClientState(GL_NORMAL_ARRAY);\n");
 			break;
 		case 2:
-			IO::print("\tglTexCoordPointer(%d, GL_FLOAT, %d*sizeof(float), %svertex_data+%d);\n",
-				size, stride, prefix, offset);
-			IO::print("\tglEnableClientState(GL_TEXTURE_COORD_ARRAY);\n");
+			if(separate_arrays)
+				source = prefix+"color_data";
+			IO::print("\tglColorPointer(%d, GL_FLOAT, %d*sizeof(float), %s);\n",
+				size, stride, source);
+			IO::print("\tglEnableClientState(GL_COLOR_ARRAY);\n");
 			break;
 		case 3:
-			IO::print("\tglColorPointer(%d, GL_FLOAT, %d*sizeof(float), %svertex_data+%d);\n",
-				size, stride, prefix, offset);
-			IO::print("\tglEnableClientState(GL_COLOR_ARRAY);\n");
+			if(separate_arrays)
+				source = prefix+"texcoord_data";
+			IO::print("\tglTexCoordPointer(%d, GL_FLOAT, %d*sizeof(float), %s);\n",
+				size, stride, source);
+			IO::print("\tglEnableClientState(GL_TEXTURE_COORD_ARRAY);\n");
 			break;
 		default:
-			IO::print("\tglVertexAttribPointer(%d, %d, GL_FLOAT, GL_FALSE, %d*sizeof(float), %svertex_data+%d);\n",
-				kind-4, size, stride, prefix, offset);
-			IO::print("\tglEnableVertexAttribArray(%d);\n", kind-4);
+			if(kind<11)
+			{
+				if(separate_arrays)
+					source = format("%stexcoord%d_data", prefix, kind-3);
+				IO::print("\tglClientActiveTexture(GL_TEXTURE%d);\n", kind-3);
+				IO::print("\tglTexCoordPointer(%d, GL_FLOAT, %d*sizeof(float), %s);\n",
+					size, stride, source);
+				IO::print("\tglEnableClientState(GL_TEXTURE_COORD_ARRAY);\n");
+			}
+			else
+			{
+				if(separate_arrays)
+					source = format("%sattrib%d_data", prefix, kind-11);
+				IO::print("\tglVertexAttribPointer(%d, %d, GL_FLOAT, GL_FALSE, %d*sizeof(float), %s);\n",
+					kind-11, size, stride, source);
+				IO::print("\tglEnableVertexAttribArray(%d);\n", kind-11);
+			}
 			break;
 		}
 		offset += size;