nuclear@0: #include <list>
nuclear@0: #include "zscn.h"
nuclear@0: 
nuclear@0: struct Face {
nuclear@0: 	Vector3 v[3];
nuclear@0: 	Vector3 n[3];
nuclear@0: 	Vector2 t[3];
nuclear@0: 
nuclear@0: 	const henge::Material *mat;
nuclear@0: 
nuclear@0: 	Face()
nuclear@0: 	{
nuclear@0: 		memset(this, 0, sizeof(Face));
nuclear@0: 	}
nuclear@0: };
nuclear@0: 
nuclear@0: static void proc_mesh(std::list<Face> *facelist, const henge::TriMesh *mesh,
nuclear@0: 		const henge::Material *mat, const Matrix4x4 &xform);
nuclear@0: static bool operator <(const Face &a, const Face &b);
nuclear@0: 
nuclear@0: ZScene::~ZScene()
nuclear@0: {
nuclear@0: }
nuclear@0: 
nuclear@0: void ZScene::render(unsigned int msec) const
nuclear@0: {
nuclear@0: 	setup_lights(msec);
nuclear@0: 
nuclear@0: 	glMatrixMode(GL_MODELVIEW);
nuclear@0: 
nuclear@0: 	Matrix4x4 view_mat;
nuclear@0: 	henge::store_matrix(&view_mat);
nuclear@0: 
nuclear@0: 	std::list<Face> facelist;
nuclear@0: 
nuclear@0: 	for(size_t i=0; i<objects.size(); i++) {
nuclear@0: 		const henge::RObject *obj = objects[i];
nuclear@0: 		Matrix4x4 xform = obj->get_xform_matrix(msec) * view_mat;
nuclear@0: 
nuclear@0: 		const henge::Material *mat = ((henge::RObject*)obj)->get_material_ptr();
nuclear@0: 		const henge::TriMesh *mesh = obj->get_mesh();
nuclear@0: 
nuclear@0: 		proc_mesh(&facelist, mesh, mat, xform);
nuclear@0: 	}
nuclear@0: 
nuclear@0: 	facelist.sort();
nuclear@0: 
nuclear@0: 	glPushAttrib(GL_ENABLE_BIT);
nuclear@0: 	glDisable(GL_DEPTH_TEST);
nuclear@0: 
nuclear@0: 	glPushMatrix();
nuclear@0: 	glLoadIdentity();
nuclear@0: 
nuclear@0: 	glBegin(GL_TRIANGLES);
nuclear@0: 
nuclear@0: 	const henge::Material *cur_mat = 0;
nuclear@0: 	std::list<Face>::iterator face = facelist.begin();
nuclear@0: 	while(face != facelist.end()) {
nuclear@0: 		if(face->mat != cur_mat) {
nuclear@0: 			glEnd();
nuclear@0: 
nuclear@0: 			face->mat->bind();
nuclear@0: 			cur_mat = face->mat;
nuclear@0: 
nuclear@0: 			glBegin(GL_TRIANGLES);
nuclear@0: 		}
nuclear@0: 
nuclear@0: 		for(int i=0; i<3; i++) {
nuclear@0: 			glNormal3f(face->n[i].x, face->n[i].y, face->n[i].z);
nuclear@0: 			glTexCoord2f(face->t[i].x, face->t[i].y);
nuclear@0: 			glVertex3f(face->v[i].x, face->v[i].y, face->v[i].z);
nuclear@0: 		}
nuclear@0: 
nuclear@0: 		face++;
nuclear@0: 	}
nuclear@0: 	glEnd();
nuclear@0: 
nuclear@0: 	glMatrixMode(GL_MODELVIEW);
nuclear@0: 	glPopMatrix();
nuclear@0: 	glPopAttrib();
nuclear@0: }
nuclear@0: 
nuclear@0: static void proc_mesh(std::list<Face> *facelist, const henge::TriMesh *mesh,
nuclear@0: 		const henge::Material *mat, const Matrix4x4 &xform)
nuclear@0: {
nuclear@0: 	Matrix3x3 norm_xform = xform;
nuclear@0: 
nuclear@0: 	const Vector3 *vert = mesh->get_data_vec3(henge::EL_VERTEX);
nuclear@0: 	const Vector3 *norm = mesh->get_data_vec3(henge::EL_NORMAL);
nuclear@0: 	const Vector2 *tc = mesh->get_data_vec2(henge::EL_TEXCOORD);
nuclear@0: 	const unsigned int *index = mesh->get_data_int(henge::EL_INDEX);
nuclear@0: 
nuclear@0: 	int nvert = mesh->get_count(henge::EL_VERTEX);
nuclear@0: 	int nindex = mesh->get_count(henge::EL_INDEX);
nuclear@0: 
nuclear@0: 	if(!vert || !nvert) {
nuclear@0: 		return;
nuclear@0: 	}
nuclear@0: 
nuclear@0: 	int face_count = (index ? nindex : nvert) / 3;
nuclear@0: 
nuclear@0: 	for(int i=0; i<face_count; i++) {
nuclear@0: 		Face face;
nuclear@0: 
nuclear@0: 		for(int j=0; j<3; j++) {
nuclear@0: 			int idx = index ? index[i * 3 + j] : i * 3 + j;
nuclear@0: 
nuclear@0: 			if(norm) {
nuclear@0: 				face.n[j] = norm[idx].transformed(norm_xform);
nuclear@0: 			}
nuclear@0: 			if(tc) {
nuclear@0: 				face.t[j] = tc[idx];
nuclear@0: 			}
nuclear@0: 			if(vert) {
nuclear@0: 				face.v[j] = vert[idx].transformed(xform);
nuclear@0: 			}
nuclear@0: 		}
nuclear@0: 
nuclear@0: 		face.mat = mat;
nuclear@0: 		facelist->push_back(face);
nuclear@0: 	}
nuclear@0: }
nuclear@0: 
nuclear@0: static bool operator <(const Face &a, const Face &b)
nuclear@0: {
nuclear@0: 	return (a.v[0].z + a.v[1].z + a.v[2].z) < (b.v[0].z + b.v[1].z + b.v[2].z);
nuclear@0: }