--- /dev/null
+/*
+goat3d - 3D scene, and animation file format library.
+Copyright (C) 2013-2023 John Tsiombikas <nuclear@member.fsf.org>
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public License
+along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+#ifndef CHUNK_H_
+#define CHUNK_H_
+
+#include "util.h"
+
+enum {
+ CNK_INVALID, /* this shouldn't appear in files */
+ CNK_SCENE, /* the root chunk */
+
+ /* general purpose chunks */
+ CNK_INT,
+ CNK_INT4,
+ CNK_FLOAT,
+ CNK_FLOAT3,
+ CNK_FLOAT4,
+ CNK_STRING,
+
+ /* --- first level chunks --- */
+ /* children of CNK_SCENE */
+ CNK_ENV, /* environmental parameters */
+ CNK_MTL, /* material */
+ CNK_MESH,
+ CNK_LIGHT,
+ CNK_CAMERA,
+ CNK_NODE,
+
+ /* --- second level chunks --- */
+ /* children of CNK_ENV */
+ CNK_ENV_AMBIENT, /* ambient color, contains a single CNK_FLOAT3 */
+ CNK_ENV_FOG,
+
+ /* --- third level chunks --- */
+ /* children of CNK_FOG */
+ CNK_FOG_COLOR, /* fog color, contains a single CNK_FLOAT3 */
+ CNK_FOG_EXP, /* fog exponent, contains a single CNK_FLOAT */
+
+ /* children of CNK_MTL */
+ CNK_MTL_NAME, /* has a single CNK_STRING */
+ CNK_MTL_ATTR, /* material attribute, has a CNK_STRING for its name, */
+ /* a CNK_MTL_ATTR_VAL, and optionally a CNK_MTL_ATTR_MAP */
+ /* children of CNK_MTL_ATTR */
+ CNK_MTL_ATTR_NAME, /* has a single CNK_STRING */
+ CNK_MTL_ATTR_VAL, /* can have a single CNK_FLOAT, CNK_FLOAT3, or CNK_FLOAT4 */
+ CNK_MTL_ATTR_MAP, /* has a single CNK_STRING */
+
+ /* children of CNK_MESH */
+ CNK_MESH_NAME, /* has a single CNK_STRING */
+ CNK_MESH_MATERIAL, /* has one of CNK_STRING or CNK_INT to identify the material */
+ CNK_MESH_VERTEX_LIST, /* has a series of CNK_FLOAT3 chunks */
+ CNK_MESH_NORMAL_LIST, /* has a series of CNK_FLOAT3 chunks */
+ CNK_MESH_TANGENT_LIST, /* has a series of CNK_FLOAT3 chunks */
+ CNK_MESH_TEXCOORD_LIST, /* has a series of CNK_FLOAT3 chunks */
+ CNK_MESH_SKINWEIGHT_LIST, /* has a series of CNK_FLOAT4 chunks (4 skin weights) */
+ CNK_MESH_SKINMATRIX_LIST, /* has a series of CNK_INT4 chunks (4 matrix indices) */
+ CNK_MESH_COLOR_LIST, /* has a series of CNK_FLOAT4 chunks */
+ CNK_MESH_BONES_LIST, /* has a series of CNK_INT or CNK_STRING chunks identifying the bone nodes */
+ CNK_MESH_FACE_LIST, /* has a series of CNK_FACE chunks */
+ CNK_MESH_FILE, /* optionally mesh data may be in another file, has a CNK_STRING filename */
+
+ /* child of CNK_MESH_FACE_LIST */
+ CNK_MESH_FACE, /* has three CNK_INT chunks */
+
+ /* children of CNK_LIGHT */
+ CNK_LIGHT_NAME, /* has a single CNK_STRING */
+ CNK_LIGHT_POS, /* has a single CNK_FLOAT3 */
+ CNK_LIGHT_COLOR, /* has a single CNK_FLOAT3 */
+ CNK_LIGHT_ATTEN, /* has a single CNK_FLOAT3 (constant, linear, squared attenuation) */
+ CNK_LIGHT_DISTANCE, /* has a single CNK_FLOAT */
+ CNK_LIGHT_DIR, /* a single CNK_FLOAT3 (for spotlights and dir-lights) */
+ CNK_LIGHT_CONE_INNER, /* single CNK_FLOAT, inner cone angle (for spotlights) */
+ CNK_LIGHT_CONE_OUTER, /* single CNK_FLOAT, outer cone angle (for spotlights) */
+
+ /* children of CNK_CAMERA */
+ CNK_CAMERA_NAME, /* has a single CNK_STRING */
+ CNK_CAMERA_POS, /* single CNK_FLOAT3 */
+ CNK_CAMERA_TARGET, /* single CNK_FLOAT3 */
+ CNK_CAMERA_FOV, /* single CNK_FLOAT (field of view in radians) */
+ CNK_CAMERA_NEARCLIP, /* single CNK_FLOAT (near clipping plane distance) */
+ CNK_CAMERA_FARCLIP, /* signle CNK_FLOAT (far clipping plane distance) */
+
+ /* children of CNK_NODE */
+ CNK_NODE_NAME, /* node name, a single CNK_STRING */
+ CNK_NODE_PARENT, /* it can have a CNK_INT or a CNK_STRING to identify the parent node */
+
+ CNK_NODE_MESH, /* it can have a CNK_INT or a CNK_STRING to identify this node's mesh */
+ CNK_NODE_LIGHT, /* same as CNK_NODE_MESH */
+ CNK_NODE_CAMERA, /* same as CNK_NODE_MESH */
+
+ CNK_NODE_POS, /* has a CNK_FLOAT3, position vector */
+ CNK_NODE_ROT, /* has a CNK_FLOAT4, rotation quaternion (x, y, z imaginary, w real) */
+ CNK_NODE_SCALE, /* has a CNK_FLOAT3, scaling */
+ CNK_NODE_PIVOT, /* has a CNK_FLOAT3, pivot point */
+
+ CNK_NODE_MATRIX0, /* has a CNK_FLOAT4, first matrix row (4x3) */
+ CNK_NODE_MATRXI1, /* has a CNK_FLOAT4, second matrix row (4x3) */
+ CNK_NODE_MATRIX2, /* has a CNK_FLOAT4, third matrix row (4x3) */
+
+ CNK_ANIM, /* the animation root chunk */
+
+ MAX_NUM_CHUNKS
+};
+
+#define UNKNOWN_SIZE ((uint32_t)0xbaadf00d)
+
+struct chunk_header {
+ uint32_t id;
+ uint32_t size;
+};
+
+struct chunk {
+ struct chunk_header hdr;
+ char data[1];
+};
+
+
+void g3dimpl_chunk_header(struct chunk_header *hdr, int id);
+int g3dimpl_write_chunk_header(const struct chunk_header *hdr, struct goat3d_io *io);
+int g3dimpl_read_chunk_header(struct chunk_header *hdr, struct goat3d_io *io);
+void g3dimpl_skip_chunk(const struct chunk_header *hdr, struct goat3d_io *io);
+
+#endif /* CHUNK_H_ */
projects / raydungeon / blobdiff