#!BPY

# """
# Name: 'OpenGL Exporter'
# Blender: 244
# Group: 'Export'
# Tooltip: 'Simple OpenGl C/C++ Code exporter.'
# """

__author__ = 'Rogerio Mazakina'
__version__ = '2.44 2007/08/03'
__url__ = ["Developers3Soft, http://developers3.webcindario.com"]
__email__ = ["Rogerio Mazakina", "gpr2k@hotmail.com", "opengl exporter"]
__bpydoc__ = """\

Usage:<br>
   Use Blender version 2.44 or higher
   Other versions may not be compatible
   Just press Alt+P to exec
   Choose the name of the file
   Done!

Support:<br>
   Only Meshes at the moment

 Known issues:<br>
   Cannot export texture information, just raw mesh
"""

import Blender 
from Blender import Mesh 

print "####################################"
print "        GL file Export Script"

def GLexport(filename):
	filename = filename
	file = open(filename,"w")
	file.write("// File Exported by GLexport Script.\n")

	# get the scene
	scene = Blender.Scene.GetCurrent()

	# get all meshes
	meshList = [ob for ob in scene.objects if ob.type == 'Mesh']

	# FOREACH MESH
	for object in meshList:
		modelName = object.getName()
		mesh = object.getData(0,1)
		print " Exporting %s now." %modelName

		file.write("void %s()\n{\n" %modelName)
		file.write("\t// Object name: %s\n" %modelName)

		faceCount = 0
		lastShadeType = -1
		lastNumVertices = -1

		# FOREACH FACE
		for face in mesh.faces:
			if lastShadeType == -1 or lastShadeType != face.smooth:
				lastShadeType = face.smooth
				# The face must be smooth if there are vertex colors!
				# Otherwise all vertices will be single color
				if face.smooth or mesh.vertexColors:
					file.write("\tglShadeModel(GL_SMOOTH);\n")
				else: 
					file.write("\tglShadeModel(GL_FLAT);\n")

			numVertices = len(face.v)

			if lastNumVertices == -1 or lastNumVertices != numVertices:
				if lastNumVertices != -1:
					file.write("\tglEnd();\n\n")

				lastNumVertices = numVertices
				if numVertices ==3:
					file.write("\tglBegin(GL_TRIANGLES);\n")
				else:
					file.write("\tglBegin(GL_QUADS);\n")

			file.write("\t\t// Face %d\n" % faceCount );

			# FOREACH VERTICE
			for vIndex in range( numVertices ):
				vertex = face.verts[vIndex]

				# VERTEX COLOR IF TRUE
				if mesh.vertexColors:
					file.write("\t\tglColor3f(%ff, %ff, %ff);\n" % (face.col[vIndex].r/255.0, face.col[vIndex].g/255.0, face.col[vIndex].b/255.0) )

				# VERTEX NORMAL
				file.write("\t\tglNormal3f(%ff, %ff, %ff);\n" % (vertex.no.x, vertex.no.y, vertex.no.z ));

				# VERTEX UV COORDS
				# Note: I really dont know if this works...
				#if mesh.faceUV: # if the mesh have texture (only UV coords)
				#	file.write("\t\tglTexCoord2f(%ff,%ff);" % (face.uv[vIndex].u, face.uv[vIndex].v))

				# VERTEX POSITION
				file.write("\t\tglVertex3f(%ff, %ff, %ff);\n" % (vertex.co.x, vertex.co.y, vertex.co.z ))
			# END FOR
			faceCount = faceCount + 1
		# END FOREACH FACE

		file.write("\tglEnd();\n\n")
		file.write("}\n")
	# END FOREACH MESH

	file.close()
	print " Export done!"
	print "-------  END GL EXPORT.PY  ----------"

Blender.Window.FileSelector(GLexport, "Export")