nuclear@8: #include <float.h>
nuclear@8: #include <assert.h>
nuclear@8: #include <string>
nuclear@8: #include <map>
nuclear@8: #include "scenefile.h"
nuclear@8: #include "goat3d.h"
nuclear@8: #include "texman.h"
nuclear@8: 
nuclear@8: SceneFile::SceneFile()
nuclear@8: {
nuclear@8: }
nuclear@8: 
nuclear@8: SceneFile::~SceneFile()
nuclear@8: {
nuclear@8: }
nuclear@8: 
nuclear@8: bool SceneFile::load(const char *fname)
nuclear@8: {
nuclear@8: 	std::map<struct goat3d_mesh*, Mesh*> meshmap;
nuclear@8: 
nuclear@8: 	struct goat3d *g3d = goat3d_create();
nuclear@8: 	if(!g3d) return false;
nuclear@8: 
nuclear@8: 	if(goat3d_load(g3d, fname) == -1) {
nuclear@8: 		return false;
nuclear@8: 	}
nuclear@8: 
nuclear@8: 	int nmeshes = goat3d_get_mesh_count(g3d);
nuclear@8: 	for(int i=0; i<nmeshes; i++) {
nuclear@8: 		struct goat3d_mesh *gm = goat3d_get_mesh(g3d, i);
nuclear@8: 		int nverts = goat3d_get_mesh_attrib_count(gm, GOAT3D_MESH_ATTR_VERTEX);
nuclear@8: 
nuclear@8: 		Mesh *m = new Mesh;
nuclear@8: 		m->set_vertex_data(MESH_VERTEX, 3, nverts, (float*)goat3d_get_mesh_attribs(gm, GOAT3D_MESH_ATTR_VERTEX));
nuclear@8: 
nuclear@8: 		int nnorm = goat3d_get_mesh_attrib_count(gm, GOAT3D_MESH_ATTR_NORMAL);
nuclear@8: 		if(nnorm) {
nuclear@8: 			assert(nnorm == nverts);
nuclear@8: 			m->set_vertex_data(MESH_NORMAL, 3, nnorm, (float*)goat3d_get_mesh_attribs(gm, GOAT3D_MESH_ATTR_NORMAL));
nuclear@8: 		}
nuclear@8: 
nuclear@8: 		int ntex = goat3d_get_mesh_attrib_count(gm, GOAT3D_MESH_ATTR_TEXCOORD);
nuclear@8: 		if(ntex) {
nuclear@8: 			assert(ntex == nverts);
nuclear@8: 			m->set_vertex_data(MESH_TEXCOORD, 2, ntex, (float*)goat3d_get_mesh_attribs(gm, GOAT3D_MESH_ATTR_TEXCOORD));
nuclear@8: 		}
nuclear@8: 
nuclear@8: 		int ntang = goat3d_get_mesh_attrib_count(gm, GOAT3D_MESH_ATTR_TANGENT);
nuclear@8: 		if(ntang) {
nuclear@8: 			assert(ntang == nverts);
nuclear@8: 			m->set_vertex_data(MESH_TANGENT, 3, ntang, (float*)goat3d_get_mesh_attribs(gm, GOAT3D_MESH_ATTR_TANGENT));
nuclear@8: 		}
nuclear@8: 
nuclear@8: 		int nfaces = goat3d_get_mesh_face_count(gm);
nuclear@8: 		if(nfaces) {
nuclear@8: 			m->set_index_data(nfaces * 3, (unsigned int*)goat3d_get_mesh_faces(gm));
nuclear@8: 		}
nuclear@8: 
nuclear@8: 		mesh.push_back(m);
nuclear@8: 		meshmap[gm] = m;
nuclear@8: 		// TODO: do this after nodes are loaded per object to pre-transform if applicable
nuclear@8: 		colmesh.push_back(m);
nuclear@8: 	}
nuclear@8: 
nuclear@8: 	/* iterate the nodes and create objects */
nuclear@8: 	int nnodes = goat3d_get_node_count(g3d);
nuclear@8: 	for(int i=0; i<nnodes; i++) {
nuclear@8: 		struct goat3d_node *gn = goat3d_get_node(g3d, i);
nuclear@8: 		if(goat3d_get_node_type(gn) != GOAT3D_NODE_MESH) {
nuclear@8: 			continue;
nuclear@8: 		}
nuclear@8: 		struct goat3d_mesh *gm = (struct goat3d_mesh*)goat3d_get_node_object(gn);
nuclear@8: 		if(!gm) continue;
nuclear@8: 		Mesh *m = meshmap[gm];
nuclear@8: 		if(!m) continue;
nuclear@8: 
nuclear@8: 		Object *obj = new Object;
nuclear@8: 		obj->set_mesh(m);
nuclear@8: 
nuclear@8: 		float mat[16];
nuclear@8: 		goat3d_get_node_matrix(gn, mat, 0);
nuclear@8: 		for(int i=0; i<4; i++) {
nuclear@8: 			for(int j=0; j<4; j++) {
nuclear@8: 				obj->xform[i][j] = mat[i * 4 + j];
nuclear@8: 			}
nuclear@8: 		}
nuclear@8: 
nuclear@8: 		struct goat3d_material *gmtl = goat3d_get_mesh_mtl(gm);
nuclear@8: 		const float *col = goat3d_get_mtl_attrib(gmtl, GOAT3D_MAT_ATTR_DIFFUSE);
nuclear@8: 		if(col) {
nuclear@8: 			obj->mtl.diffuse = Vector3(col[0], col[1], col[2]);
nuclear@8: 		}
nuclear@8: 		if((col = goat3d_get_mtl_attrib(gmtl, GOAT3D_MAT_ATTR_SPECULAR))) {
nuclear@8: 			obj->mtl.specular = Vector3(col[0], col[1], col[2]);
nuclear@8: 		}
nuclear@8: 		if((col = goat3d_get_mtl_attrib(gmtl, GOAT3D_MAT_ATTR_ALPHA))) {
nuclear@8: 			obj->mtl.alpha = col[0];
nuclear@8: 		}
nuclear@8: 		if((col = goat3d_get_mtl_attrib(gmtl, GOAT3D_MAT_ATTR_SHININESS))) {
nuclear@8: 			obj->mtl.shininess = col[0];
nuclear@8: 		}
nuclear@8: 		const char *fname = goat3d_get_mtl_attrib_map(gmtl, GOAT3D_MAT_ATTR_DIFFUSE);
nuclear@8: 		if(fname) {
nuclear@8: 			obj->mtl.tex = get_texture(fname);
nuclear@8: 		}
nuclear@8: 
nuclear@8: 		this->obj.push_back(obj);
nuclear@8: 	}
nuclear@8: 
nuclear@8: 	goat3d_free(g3d);
nuclear@8: 	return true;
nuclear@8: }
nuclear@8: 
nuclear@8: static Vector3 bary(const Vector3 &a, const Vector3 &b, const Vector3 &c,
nuclear@8: 		const Vector3 &p)
nuclear@8: {
nuclear@8: 	float ctri = cross_product(b - a, c - a).length();
nuclear@8: 	if(ctri == 0.0f) {
nuclear@8: 		return Vector3(2, 0, 0);
nuclear@8: 	}
nuclear@8: 
nuclear@8: 	float ca = cross_product(b - p, c - p).length() / ctri;
nuclear@8: 	float cb = cross_product(a - p, c - p).length() / ctri;
nuclear@8: 	float cc = cross_product(a - p, b - p).length() / ctri;
nuclear@8: 
nuclear@8: 	return Vector3(ca, cb, cc);
nuclear@8: }
nuclear@8: 
nuclear@8: extern MeshFace dbg_walk_face;
nuclear@8: 
nuclear@8: Vector3 SceneFile::find_walk_pos(const Vector3 &pos) const
nuclear@8: {
nuclear@8: 	float max_y = -FLT_MAX;
nuclear@8: 	Vector3 pos_xz = Vector3(pos.x, 0, pos.z);
nuclear@8: 
nuclear@8: 	for(size_t i=0; i<colmesh.size(); i++) {
nuclear@8: 		const Mesh *m = colmesh[i];
nuclear@8: 
nuclear@8: 		int num_faces = m->get_face_count();
nuclear@8: 		for(int j=0; j<num_faces; j++) {
nuclear@8: 			MeshFace face = m->get_face(j);
nuclear@8: 
nuclear@8: 			Vector3 v0_xz = Vector3(face.v[0].x, 0, face.v[0].z);
nuclear@8: 			Vector3 v1_xz = Vector3(face.v[1].x, 0, face.v[1].z);
nuclear@8: 			Vector3 v2_xz = Vector3(face.v[2].x, 0, face.v[2].z);
nuclear@8: 
nuclear@8: 			Vector3 bc = bary(v0_xz, v1_xz, v2_xz, pos_xz);
nuclear@8: 			float bsum = bc.x + bc.y + bc.z;
nuclear@8: 			if(bsum > 1.000001) {
nuclear@8: 				continue;
nuclear@8: 			}
nuclear@8: 
nuclear@8: 			float y = face.v[0].y * bc.x + face.v[1].y * bc.y + face.v[2].y * bc.z;
nuclear@8: 			if(y > max_y && y <= pos.y) {
nuclear@8: 				dbg_walk_face = face;
nuclear@8: 				max_y = y;
nuclear@8: 			}
nuclear@8: 		}
nuclear@8: 	}
nuclear@8: 
nuclear@8: 	if(max_y == -FLT_MAX) {
nuclear@8: 		return pos;
nuclear@8: 	}
nuclear@8: 	return Vector3(pos.x, max_y, pos.z);
nuclear@8: }