Ogre源代码浅析——脚本及其解析（七）
ScriptCompilerManager是进行脚本解析的关键类型对象（参见：http://www.cnblogs.com/yzwalkman/archive/2012/12/30/2839013.html “脚本及其解析（一）”）。ScriptCompilerManager在其构造函数中将会创建ScriptCompiler对象实例，并将对象指针赋给其mScriptCompiler成员变量。前面所说解析过程的三个阶段即是由此mScriptCompiler对象完成的。对于ScriptCompiler来说，除了前面涉及的各函数过程外，还有两块内容值得关注。一是，如下的枚举变量定义：
1 enum 2 { 3 ID_MATERIAL = 3, 4 ID_VERTEX_PROGRAM, 5 ID_GEOMETRY_PROGRAM, 6 ID_FRAGMENT_PROGRAM, 7 ID_TECHNIQUE, 8 ID_PASS, 9 ID_TEXTURE_UNIT, 10 ID_VERTEX_PROGRAM_REF, 11 ID_GEOMETRY_PROGRAM_REF, 12 ID_FRAGMENT_PROGRAM_REF, 13 ID_SHADOW_CASTER_VERTEX_PROGRAM_REF, 14 ID_SHADOW_CASTER_FRAGMENT_PROGRAM_REF, 15 ID_SHADOW_RECEIVER_VERTEX_PROGRAM_REF, 16 ID_SHADOW_RECEIVER_FRAGMENT_PROGRAM_REF, 17 ID_SHADOW_CASTER_MATERIAL, 18 ID_SHADOW_RECEIVER_MATERIAL, 19 20 ID_LOD_VALUES, 21 ID_LOD_STRATEGY, 22 ID_LOD_DISTANCES, 23 ID_RECEIVE_SHADOWS, 24 ID_TRANSPARENCY_CASTS_SHADOWS, 25 ID_SET_TEXTURE_ALIAS, 26 27 ID_SOURCE, 28 ID_SYNTAX, 29 ID_DEFAULT_PARAMS, 30 ID_PARAM_INDEXED, 31 ID_PARAM_NAMED, 32 ID_PARAM_INDEXED_AUTO, 33 ID_PARAM_NAMED_AUTO, 34 35 ID_SCHEME, 36 ID_LOD_INDEX, 37 ID_GPU_VENDOR_RULE, 38 ID_GPU_DEVICE_RULE, 39 ID_INCLUDE, 40 ID_EXCLUDE, 41 42 ID_AMBIENT, 43 ID_DIFFUSE, 44 ID_SPECULAR, 45 ID_EMISSIVE, 46 ID_VERTEXCOLOUR, 47 ID_SCENE_BLEND, 48 ID_COLOUR_BLEND, 49 ID_ONE, 50 ID_ZERO, 51 ID_DEST_COLOUR, 52 ID_SRC_COLOUR, 53 ID_ONE_MINUS_DEST_COLOUR, 54 ID_ONE_MINUS_SRC_COLOUR, 55 ID_DEST_ALPHA, 56 ID_SRC_ALPHA, 57 ID_ONE_MINUS_DEST_ALPHA, 58 ID_ONE_MINUS_SRC_ALPHA, 59 ID_SEPARATE_SCENE_BLEND, 60 ID_SCENE_BLEND_OP, 61 ID_REVERSE_SUBTRACT, 62 ID_MIN, 63 ID_MAX, 64 ID_SEPARATE_SCENE_BLEND_OP, 65 ID_DEPTH_CHECK, 66 ID_DEPTH_WRITE, 67 ID_DEPTH_FUNC, 68 ID_DEPTH_BIAS, 69 ID_ITERATION_DEPTH_BIAS, 70 ID_ALWAYS_FAIL, 71 ID_ALWAYS_PASS, 72 ID_LESS_EQUAL, 73 ID_LESS, 74 ID_EQUAL, 75 ID_NOT_EQUAL, 76 ID_GREATER_EQUAL, 77 ID_GREATER, 78 ID_ALPHA_REJECTION, 79 ID_ALPHA_TO_COVERAGE, 80 ID_LIGHT_SCISSOR, 81 ID_LIGHT_CLIP_PLANES, 82 ID_TRANSPARENT_SORTING, 83 ID_ILLUMINATION_STAGE, 84 ID_DECAL, 85 ID_CULL_HARDWARE, 86 ID_CLOCKWISE, 87 ID_ANTICLOCKWISE, 88 ID_CULL_SOFTWARE, 89 ID_BACK, 90 ID_FRONT, 91 ID_NORMALISE_NORMALS, 92 ID_LIGHTING, 93 ID_SHADING, 94 ID_FLAT, 95 ID_GOURAUD, 96 ID_PHONG, 97 ID_POLYGON_MODE, 98 ID_SOLID, 99 ID_WIREFRAME, 100 ID_POINTS, 101 ID_POLYGON_MODE_OVERRIDEABLE, 102 ID_FOG_OVERRIDE, 103 ID_NONE, 104 ID_LINEAR, 105 ID_EXP, 106 ID_EXP2, 107 ID_COLOUR_WRITE, 108 ID_MAX_LIGHTS, 109 ID_START_LIGHT, 110 ID_ITERATION, 111 ID_ONCE, 112 ID_ONCE_PER_LIGHT, 113 ID_PER_LIGHT, 114 ID_PER_N_LIGHTS, 115 ID_POINT, 116 ID_SPOT, 117 ID_DIRECTIONAL, 118 ID_LIGHT_MASK, 119 ID_POINT_SIZE, 120 ID_POINT_SPRITES, 121 ID_POINT_SIZE_ATTENUATION, 122 ID_POINT_SIZE_MIN, 123 ID_POINT_SIZE_MAX, 124 125 ID_TEXTURE_ALIAS, 126 ID_TEXTURE, 127 ID_1D, 128 ID_2D, 129 ID_3D, 130 ID_CUBIC, 131 ID_UNLIMITED, 132 ID_ALPHA, 133 ID_GAMMA, 134 ID_ANIM_TEXTURE, 135 ID_CUBIC_TEXTURE, 136 ID_SEPARATE_UV, 137 ID_COMBINED_UVW, 138 ID_TEX_COORD_SET, 139 ID_TEX_ADDRESS_MODE, 140 ID_WRAP, 141 ID_CLAMP, 142 ID_BORDER, 143 ID_MIRROR, 144 ID_TEX_BORDER_COLOUR, 145 ID_FILTERING, 146 ID_BILINEAR, 147 ID_TRILINEAR, 148 ID_ANISOTROPIC, 149 ID_MAX_ANISOTROPY, 150 ID_MIPMAP_BIAS, 151 ID_COLOUR_OP, 152 ID_REPLACE, 153 ID_ADD, 154 ID_MODULATE, 155 ID_ALPHA_BLEND, 156 ID_COLOUR_OP_EX, 157 ID_SOURCE1, 158 ID_SOURCE2, 159 ID_MODULATE_X2, 160 ID_MODULATE_X4, 161 ID_ADD_SIGNED, 162 ID_ADD_SMOOTH, 163 ID_SUBTRACT, 164 ID_BLEND_DIFFUSE_COLOUR, 165 ID_BLEND_DIFFUSE_ALPHA, 166 ID_BLEND_TEXTURE_ALPHA, 167 ID_BLEND_CURRENT_ALPHA, 168 ID_BLEND_MANUAL, 169 ID_DOT_PRODUCT, 170 ID_SRC_CURRENT, 171 ID_SRC_TEXTURE, 172 ID_SRC_DIFFUSE, 173 ID_SRC_SPECULAR, 174 ID_SRC_MANUAL, 175 ID_COLOUR_OP_MULTIPASS_FALLBACK, 176 ID_ALPHA_OP_EX, 177 ID_ENV_MAP, 178 ID_SPHERICAL, 179 ID_PLANAR, 180 ID_CUBIC_REFLECTION, 181 ID_CUBIC_NORMAL, 182 ID_SCROLL, 183 ID_SCROLL_ANIM, 184 ID_ROTATE, 185 ID_ROTATE_ANIM, 186 ID_SCALE, 187 ID_WAVE_XFORM, 188 ID_SCROLL_X, 189 ID_SCROLL_Y, 190 ID_SCALE_X, 191 ID_SCALE_Y, 192 ID_SINE, 193 ID_TRIANGLE, 194 ID_SQUARE, 195 ID_SAWTOOTH, 196 ID_INVERSE_SAWTOOTH, 197 ID_TRANSFORM, 198 ID_BINDING_TYPE, 199 ID_VERTEX, 200 ID_FRAGMENT, 201 ID_CONTENT_TYPE, 202 ID_NAMED, 203 ID_SHADOW, 204 ID_TEXTURE_SOURCE, 205 ID_SHARED_PARAMS, 206 ID_SHARED_PARAM_NAMED, 207 ID_SHARED_PARAMS_REF, 208 209 ID_PARTICLE_SYSTEM, 210 ID_EMITTER, 211 ID_AFFECTOR, 212 213 ID_COMPOSITOR, 214 ID_TARGET, 215 ID_TARGET_OUTPUT, 216 217 ID_INPUT, 218 ID_PREVIOUS, 219 ID_TARGET_WIDTH, 220 ID_TARGET_HEIGHT, 221 ID_TARGET_WIDTH_SCALED, 222 ID_TARGET_HEIGHT_SCALED, 223 ID_COMPOSITOR_LOGIC, 224 ID_TEXTURE_REF, 225 ID_SCOPE_LOCAL, 226 ID_SCOPE_CHAIN, 227 ID_SCOPE_GLOBAL, 228 ID_POOLED, 229 //ID_GAMMA, - already registered for material 230 ID_NO_FSAA, 231 ID_DEPTH_POOL, 232 ID_ONLY_INITIAL, 233 ID_VISIBILITY_MASK, 234 ID_LOD_BIAS, 235 ID_MATERIAL_SCHEME, 236 ID_SHADOWS_ENABLED, 237 238 ID_CLEAR, 239 ID_STENCIL, 240 ID_RENDER_SCENE, 241 ID_RENDER_QUAD, 242 ID_IDENTIFIER, 243 ID_FIRST_RENDER_QUEUE, 244 ID_LAST_RENDER_QUEUE, 245 ID_QUAD_NORMALS, 246 ID_CAMERA_FAR_CORNERS_VIEW_SPACE, 247 ID_CAMERA_FAR_CORNERS_WORLD_SPACE, 248 249 ID_BUFFERS, 250 ID_COLOUR, 251 ID_DEPTH, 252 ID_COLOUR_VALUE, 253 ID_DEPTH_VALUE, 254 ID_STENCIL_VALUE, 255 256 ID_CHECK, 257 ID_COMP_FUNC, 258 ID_REF_VALUE, 259 ID_MASK, 260 ID_FAIL_OP, 261 ID_KEEP, 262 ID_INCREMENT, 263 ID_DECREMENT, 264 ID_INCREMENT_WRAP, 265 ID_DECREMENT_WRAP, 266 ID_INVERT, 267 ID_DEPTH_FAIL_OP, 268 ID_PASS_OP, 269 ID_TWO_SIDED, 270 #ifdef RTSHADER_SYSTEM_BUILD_CORE_SHADERS 271 ID_RT_SHADER_SYSTEM, 272 #endif 273 ID_END_BUILTIN_IDS 274 };
此枚举变量中的各个值，对应着在Ogre脚本文件中出现的所有的关键字。 二是，ScriptCompiler相关的成员变量mIds，定义如下：
1 typedef HashMap<String,uint32> IdMap; 2 ... 3 IdMap mIds;
对mIds的初始化，是在ScriptCompiler类的initWordMap函数中完成的：
1 void ScriptCompiler::initWordMap() 2 { 3 mIds["on"] = ID_ON; 4 mIds["off"] = ID_OFF; 5 mIds["true"] = ID_TRUE; 6 mIds["false"] = ID_FALSE; 7 mIds["yes"] = ID_YES; 8 mIds["no"] = ID_NO; 9 10 // Material ids 11 mIds["material"] = ID_MATERIAL; 12 mIds["vertex_program"] = ID_VERTEX_PROGRAM; 13 mIds["geometry_program"] = ID_GEOMETRY_PROGRAM; 14 mIds["fragment_program"] = ID_FRAGMENT_PROGRAM; 15 mIds["technique"] = ID_TECHNIQUE; 16 mIds["pass"] = ID_PASS; 17 mIds["texture_unit"] = ID_TEXTURE_UNIT; 18 mIds["vertex_program_ref"] = ID_VERTEX_PROGRAM_REF; 19 mIds["geometry_program_ref"] = ID_GEOMETRY_PROGRAM_REF; 20 mIds["fragment_program_ref"] = ID_FRAGMENT_PROGRAM_REF; 21 mIds["shadow_caster_vertex_program_ref"] = ID_SHADOW_CASTER_VERTEX_PROGRAM_REF; 22 mIds["shadow_caster_fragment_program_ref"] = ID_SHADOW_CASTER_FRAGMENT_PROGRAM_REF; 23 mIds["shadow_receiver_vertex_program_ref"] = ID_SHADOW_RECEIVER_VERTEX_PROGRAM_REF; 24 mIds["shadow_receiver_fragment_program_ref"] = ID_SHADOW_RECEIVER_FRAGMENT_PROGRAM_REF; 25 26 mIds["lod_values"] = ID_LOD_VALUES; 27 mIds["lod_strategy"] = ID_LOD_STRATEGY; 28 mIds["lod_distances"] = ID_LOD_DISTANCES; 29 mIds["receive_shadows"] = ID_RECEIVE_SHADOWS; 30 mIds["transparency_casts_shadows"] = ID_TRANSPARENCY_CASTS_SHADOWS; 31 mIds["set_texture_alias"] = ID_SET_TEXTURE_ALIAS; 32 33 mIds["source"] = ID_SOURCE; 34 mIds["syntax"] = ID_SYNTAX; 35 mIds["default_params"] = ID_DEFAULT_PARAMS; 36 mIds["param_indexed"] = ID_PARAM_INDEXED; 37 mIds["param_named"] = ID_PARAM_NAMED; 38 mIds["param_indexed_auto"] = ID_PARAM_INDEXED_AUTO; 39 mIds["param_named_auto"] = ID_PARAM_NAMED_AUTO; 40 41 mIds["scheme"] = ID_SCHEME; 42 mIds["lod_index"] = ID_LOD_INDEX; 43 mIds["shadow_caster_material"] = ID_SHADOW_CASTER_MATERIAL; 44 mIds["shadow_receiver_material"] = ID_SHADOW_RECEIVER_MATERIAL; 45 mIds["gpu_vendor_rule"] = ID_GPU_VENDOR_RULE; 46 mIds["gpu_device_rule"] = ID_GPU_DEVICE_RULE; 47 mIds["include"] = ID_INCLUDE; 48 mIds["exclude"] = ID_EXCLUDE; 49 50 mIds["ambient"] = ID_AMBIENT; 51 mIds["diffuse"] = ID_DIFFUSE; 52 mIds["specular"] = ID_SPECULAR; 53 mIds["emissive"] = ID_EMISSIVE; 54 mIds["vertexcolour"] = ID_VERTEXCOLOUR; 55 mIds["scene_blend"] = ID_SCENE_BLEND; 56 mIds["colour_blend"] = ID_COLOUR_BLEND; 57 mIds["one"] = ID_ONE; 58 mIds["zero"] = ID_ZERO; 59 mIds["dest_colour"] = ID_DEST_COLOUR; 60 mIds["src_colour"] = ID_SRC_COLOUR; 61 mIds["one_minus_src_colour"] = ID_ONE_MINUS_SRC_COLOUR; 62 mIds["one_minus_dest_colour"] = ID_ONE_MINUS_DEST_COLOUR; 63 mIds["dest_alpha"] = ID_DEST_ALPHA; 64 mIds["src_alpha"] = ID_SRC_ALPHA; 65 mIds["one_minus_dest_alpha"] = ID_ONE_MINUS_DEST_ALPHA; 66 mIds["one_minus_src_alpha"] = ID_ONE_MINUS_SRC_ALPHA; 67 mIds["separate_scene_blend"] = ID_SEPARATE_SCENE_BLEND; 68 mIds["scene_blend_op"] = ID_SCENE_BLEND_OP; 69 mIds["reverse_subtract"] = ID_REVERSE_SUBTRACT; 70 mIds["min"] = ID_MIN; 71 mIds["max"] = ID_MAX; 72 mIds["separate_scene_blend_op"] = ID_SEPARATE_SCENE_BLEND_OP; 73 mIds["depth_check"] = ID_DEPTH_CHECK; 74 mIds["depth_write"] = ID_DEPTH_WRITE; 75 mIds["depth_func"] = ID_DEPTH_FUNC; 76 mIds["depth_bias"] = ID_DEPTH_BIAS; 77 mIds["iteration_depth_bias"] = ID_ITERATION_DEPTH_BIAS; 78 mIds["always_fail"] = ID_ALWAYS_FAIL; 79 mIds["always_pass"] = ID_ALWAYS_PASS; 80 mIds["less_equal"] = ID_LESS_EQUAL; 81 mIds["less"] = ID_LESS; 82 mIds["equal"] = ID_EQUAL; 83 mIds["not_equal"] = ID_NOT_EQUAL; 84 mIds["greater_equal"] = ID_GREATER_EQUAL; 85 mIds["greater"] = ID_GREATER; 86 mIds["alpha_rejection"] = ID_ALPHA_REJECTION; 87 mIds["alpha_to_coverage"] = ID_ALPHA_TO_COVERAGE; 88 mIds["light_scissor"] = ID_LIGHT_SCISSOR; 89 mIds["light_clip_planes"] = ID_LIGHT_CLIP_PLANES; 90 mIds["transparent_sorting"] = ID_TRANSPARENT_SORTING; 91 mIds["illumination_stage"] = ID_ILLUMINATION_STAGE; 92 mIds["decal"] = ID_DECAL; 93 mIds["cull_hardware"] = ID_CULL_HARDWARE; 94 mIds["clockwise"] = ID_CLOCKWISE; 95 mIds["anticlockwise"] = ID_ANTICLOCKWISE; 96 mIds["cull_software"] = ID_CULL_SOFTWARE; 97 mIds["back"] = ID_BACK; 98 mIds["front"] = ID_FRONT; 99 mIds["normalise_normals"] = ID_NORMALISE_NORMALS; 100 mIds["lighting"] = ID_LIGHTING; 101 mIds["shading"] = ID_SHADING; 102 mIds["flat"] = ID_FLAT; 103 mIds["gouraud"] = ID_GOURAUD; 104 mIds["phong"] = ID_PHONG; 105 mIds["polygon_mode"] = ID_POLYGON_MODE; 106 mIds["solid"] = ID_SOLID; 107 mIds["wireframe"] = ID_WIREFRAME; 108 mIds["points"] = ID_POINTS; 109 mIds["polygon_mode_overrideable"] = ID_POLYGON_MODE_OVERRIDEABLE; 110 mIds["fog_override"] = ID_FOG_OVERRIDE; 111 mIds["none"] = ID_NONE; 112 mIds["linear"] = ID_LINEAR; 113 mIds["exp"] = ID_EXP; 114 mIds["exp2"] = ID_EXP2; 115 mIds["colour_write"] = ID_COLOUR_WRITE; 116 mIds["max_lights"] = ID_MAX_LIGHTS; 117 mIds["start_light"] = ID_START_LIGHT; 118 mIds["iteration"] = ID_ITERATION; 119 mIds["once"] = ID_ONCE; 120 mIds["once_per_light"] = ID_ONCE_PER_LIGHT; 121 mIds["per_n_lights"] = ID_PER_N_LIGHTS; 122 mIds["per_light"] = ID_PER_LIGHT; 123 mIds["point"] = ID_POINT; 124 mIds["spot"] = ID_SPOT; 125 mIds["directional"] = ID_DIRECTIONAL; 126 mIds["light_mask"] = ID_LIGHT_MASK; 127 mIds["point_size"] = ID_POINT_SIZE; 128 mIds["point_sprites"] = ID_POINT_SPRITES; 129 mIds["point_size_min"] = ID_POINT_SIZE_MIN; 130 mIds["point_size_max"] = ID_POINT_SIZE_MAX; 131 mIds["point_size_attenuation"] = ID_POINT_SIZE_ATTENUATION; 132 133 mIds["texture_alias"] = ID_TEXTURE_ALIAS; 134 mIds["texture"] = ID_TEXTURE; 135 mIds["1d"] = ID_1D; 136 mIds["2d"] = ID_2D; 137 mIds["3d"] = ID_3D; 138 mIds["cubic"] = ID_CUBIC; 139 mIds["unlimited"] = ID_UNLIMITED; 140 mIds["alpha"] = ID_ALPHA; 141 mIds["gamma"] = ID_GAMMA; 142 mIds["anim_texture"] = ID_ANIM_TEXTURE; 143 mIds["cubic_texture"] = ID_CUBIC_TEXTURE; 144 mIds["separateUV"] = ID_SEPARATE_UV; 145 mIds["combinedUVW"] = ID_COMBINED_UVW; 146 mIds["tex_coord_set"] = ID_TEX_COORD_SET; 147 mIds["tex_address_mode"] = ID_TEX_ADDRESS_MODE; 148 mIds["wrap"] = ID_WRAP; 149 mIds["clamp"] = ID_CLAMP; 150 mIds["mirror"] = ID_MIRROR; 151 mIds["border"] = ID_BORDER; 152 mIds["tex_border_colour"] = ID_TEX_BORDER_COLOUR; 153 mIds["filtering"] = ID_FILTERING; 154 mIds["bilinear"] = ID_BILINEAR; 155 mIds["trilinear"] = ID_TRILINEAR; 156 mIds["anisotropic"] = ID_ANISOTROPIC; 157 mIds["max_anisotropy"] = ID_MAX_ANISOTROPY; 158 mIds["mipmap_bias"] = ID_MIPMAP_BIAS; 159 mIds["colour_op"] = ID_COLOUR_OP; 160 mIds["replace"] = ID_REPLACE; 161 mIds["add"] = ID_ADD; 162 mIds["modulate"] = ID_MODULATE; 163 mIds["alpha_blend"] = ID_ALPHA_BLEND; 164 mIds["colour_op_ex"] = ID_COLOUR_OP_EX; 165 mIds["source1"] = ID_SOURCE1; 166 mIds["source2"] = ID_SOURCE2; 167 mIds["modulate"] = ID_MODULATE; 168 mIds["modulate_x2"] = ID_MODULATE_X2; 169 mIds["modulate_x4"] = ID_MODULATE_X4; 170 mIds["add"] = ID_ADD; 171 mIds["add_signed"] = ID_ADD_SIGNED; 172 mIds["add_smooth"] = ID_ADD_SMOOTH; 173 mIds["subtract"] = ID_SUBTRACT; 174 mIds["blend_diffuse_alpha"] = ID_BLEND_DIFFUSE_ALPHA; 175 mIds["blend_texture_alpha"] = ID_BLEND_TEXTURE_ALPHA; 176 mIds["blend_current_alpha"] = ID_BLEND_CURRENT_ALPHA; 177 mIds["blend_manual"] = ID_BLEND_MANUAL; 178 mIds["dotproduct"] = ID_DOT_PRODUCT; 179 mIds["blend_diffuse_colour"] = ID_BLEND_DIFFUSE_COLOUR; 180 mIds["src_current"] = ID_SRC_CURRENT; 181 mIds["src_texture"] = ID_SRC_TEXTURE; 182 mIds["src_diffuse"] = ID_SRC_DIFFUSE; 183 mIds["src_specular"] = ID_SRC_SPECULAR; 184 mIds["src_manual"] = ID_SRC_MANUAL; 185 mIds["colour_op_multipass_fallback"] = ID_COLOUR_OP_MULTIPASS_FALLBACK; 186 mIds["alpha_op_ex"] = ID_ALPHA_OP_EX; 187 mIds["env_map"] = ID_ENV_MAP; 188 mIds["spherical"] = ID_SPHERICAL; 189 mIds["planar"] = ID_PLANAR; 190 mIds["cubic_reflection"] = ID_CUBIC_REFLECTION; 191 mIds["cubic_normal"] = ID_CUBIC_NORMAL; 192 mIds["scroll"] = ID_SCROLL; 193 mIds["scroll_anim"] = ID_SCROLL_ANIM; 194 mIds["rotate"] = ID_ROTATE; 195 mIds["rotate_anim"] = ID_ROTATE_ANIM; 196 mIds["scale"] = ID_SCALE; 197 mIds["wave_xform"] = ID_WAVE_XFORM; 198 mIds["scroll_x"] = ID_SCROLL_X; 199 mIds["scroll_y"] = ID_SCROLL_Y; 200 mIds["scale_x"] = ID_SCALE_X; 201 mIds["scale_y"] = ID_SCALE_Y; 202 mIds["sine"] = ID_SINE; 203 mIds["triangle"] = ID_TRIANGLE; 204 mIds["sawtooth"] = ID_SAWTOOTH; 205 mIds["square"] = ID_SQUARE; 206 mIds["inverse_sawtooth"] = ID_INVERSE_SAWTOOTH; 207 mIds["transform"] = ID_TRANSFORM; 208 mIds["binding_type"] = ID_BINDING_TYPE; 209 mIds["vertex"] = ID_VERTEX; 210 mIds["fragment"] = ID_FRAGMENT; 211 mIds["content_type"] = ID_CONTENT_TYPE; 212 mIds["named"] = ID_NAMED; 213 mIds["shadow"] = ID_SHADOW; 214 mIds["texture_source"] = ID_TEXTURE_SOURCE; 215 mIds["shared_params"] = ID_SHARED_PARAMS; 216 mIds["shared_param_named"] = ID_SHARED_PARAM_NAMED; 217 mIds["shared_params_ref"] = ID_SHARED_PARAMS_REF; 218 219 // Particle system 220 mIds["particle_system"] = ID_PARTICLE_SYSTEM; 221 mIds["emitter"] = ID_EMITTER; 222 mIds["affector"] = ID_AFFECTOR; 223 224 // Compositor 225 mIds["compositor"] = ID_COMPOSITOR; 226 mIds["target"] = ID_TARGET; 227 mIds["target_output"] = ID_TARGET_OUTPUT; 228 229 mIds["input"] = ID_INPUT; 230 mIds["none"] = ID_NONE; 231 mIds["previous"] = ID_PREVIOUS; 232 mIds["target_width"] = ID_TARGET_WIDTH; 233 mIds["target_height"] = ID_TARGET_HEIGHT; 234 mIds["target_width_scaled"] = ID_TARGET_WIDTH_SCALED; 235 mIds["target_height_scaled"] = ID_TARGET_HEIGHT_SCALED; 236 mIds["pooled"] = ID_POOLED; 237 //mIds["gamma"] = ID_GAMMA; - already registered 238 mIds["no_fsaa"] = ID_NO_FSAA; 239 mIds["depth_pool"] = ID_DEPTH_POOL; 240 241 mIds["texture_ref"] = ID_TEXTURE_REF; 242 mIds["local_scope"] = ID_SCOPE_LOCAL; 243 mIds["chain_scope"] = ID_SCOPE_CHAIN; 244 mIds["global_scope"] = ID_SCOPE_GLOBAL; 245 mIds["compositor_logic"] = ID_COMPOSITOR_LOGIC; 246 247 mIds["only_initial"] = ID_ONLY_INITIAL; 248 mIds["visibility_mask"] = ID_VISIBILITY_MASK; 249 mIds["lod_bias"] = ID_LOD_BIAS; 250 mIds["material_scheme"] = ID_MATERIAL_SCHEME; 251 mIds["shadows"] = ID_SHADOWS_ENABLED; 252 253 mIds["clear"] = ID_CLEAR; 254 mIds["stencil"] = ID_STENCIL; 255 mIds["render_scene"] = ID_RENDER_SCENE; 256 mIds["render_quad"] = ID_RENDER_QUAD; 257 mIds["identifier"] = ID_IDENTIFIER; 258 mIds["first_render_queue"] = ID_FIRST_RENDER_QUEUE; 259 mIds["last_render_queue"] = ID_LAST_RENDER_QUEUE; 260 mIds["quad_normals"] = ID_QUAD_NORMALS; 261 mIds["camera_far_corners_view_space"] = ID_CAMERA_FAR_CORNERS_VIEW_SPACE; 262 mIds["camera_far_corners_world_space"] = ID_CAMERA_FAR_CORNERS_WORLD_SPACE; 263 264 mIds["buffers"] = ID_BUFFERS; 265 mIds["colour"] = ID_COLOUR; 266 mIds["depth"] = ID_DEPTH; 267 mIds["colour_value"] = ID_COLOUR_VALUE; 268 mIds["depth_value"] = ID_DEPTH_VALUE; 269 mIds["stencil_value"] = ID_STENCIL_VALUE; 270 271 mIds["check"] = ID_CHECK; 272 mIds["comp_func"] = ID_COMP_FUNC; 273 mIds["ref_value"] = ID_REF_VALUE; 274 mIds["mask"] = ID_MASK; 275 mIds["fail_op"] = ID_FAIL_OP; 276 mIds["keep"] = ID_KEEP; 277 mIds["increment"] = ID_INCREMENT; 278 mIds["decrement"] = ID_DECREMENT; 279 mIds["increment_wrap"] = ID_INCREMENT_WRAP; 280 mIds["decrement_wrap"] = ID_DECREMENT_WRAP; 281 mIds["invert"] = ID_INVERT; 282 mIds["depth_fail_op"] = ID_DEPTH_FAIL_OP; 283 mIds["pass_op"] = ID_PASS_OP; 284 mIds["two_sided"] = ID_TWO_SIDED; 285 #ifdef RTSHADER_SYSTEM_BUILD_CORE_SHADERS 286 mIds["rtshader_system"] = ID_RT_SHADER_SYSTEM; 287 #endif 288 }
可以看到，mIds容器主要用于将脚本文件中的关键字映射到相关的枚举变量上，并保存这种对应关系。
脚本文件的解析，在完成了之前的三个阶段后，Ogre将会根据解析所得的脚本文件类型和结构来创建脚本数据对象，读取相应的脚本数据。为此，Ogre还引入了ScriptTranslator类型，并定义了以下类型MaterialTranslator、TechniqueTranslator、PassTranslator、TextureUnitTranslator、TextureSourceTranslator、GpuProgramTranslator、SharedParamsTranslator、ParticleSystemTranslator、ParticleEmitterTranslator、ParticleAffectorTranslator、CompositorTranslator、CompositionTechniqueTranslator、CompositionTargetPassTranslator和CompositionPassTranslator作为ScriptTranslator类的派生类。这些ScriptTranslator类对象实例由ScriptTranslatorManager来管理。ScriptTranslatorManager作为ScriptCompilerManager的成员变量被保存，其在ScriptCompilerManager中相应的成员变量的定义为：
1 // Stores a map from object types to the translators that handle them 2 vector<ScriptTranslatorManager*>::type mManagers; 3 4 // A pointer to the built-in ScriptTranslatorManager 5 ScriptTranslatorManager *mBuiltinTranslatorManager;
Ogre并不是直接对ScriptTranslatorManager进行实例化并加以保存；而是以ScriptTranslatorManager为基类，定义一个派生类——BuiltinScriptTranslatorManager，然后将创建的BuiltinScriptTranslatorManager的对象指针保存在ScriptCompilerManager中，BuiltinScriptTranslatorManager定义如下：
1 class _OgreExport BuiltinScriptTranslatorManager : public ScriptTranslatorManager 2 { 3 private: 4 MaterialTranslator mMaterialTranslator; 5 TechniqueTranslator mTechniqueTranslator; 6 PassTranslator mPassTranslator; 7 TextureUnitTranslator mTextureUnitTranslator; 8 TextureSourceTranslator mTextureSourceTranslator; 9 GpuProgramTranslator mGpuProgramTranslator; 10 SharedParamsTranslator mSharedParamsTranslator; 11 ParticleSystemTranslator mParticleSystemTranslator; 12 ParticleEmitterTranslator mParticleEmitterTranslator; 13 ParticleAffectorTranslator mParticleAffectorTranslator; 14 CompositorTranslator mCompositorTranslator; 15 CompositionTechniqueTranslator mCompositionTechniqueTranslator; 16 CompositionTargetPassTranslator mCompositionTargetPassTranslator; 17 CompositionPassTranslator mCompositionPassTranslator; 18 public: 19 BuiltinScriptTranslatorManager(); 20 /// Returns the number of translators being managed 21 virtual size_t getNumTranslators() const; 22 /// Returns a manager for the given object abstract node, or null if it is not supported 23 virtual ScriptTranslator *getTranslator(const AbstractNodePtr &node); 24 };
可以看到，BuiltinScriptTranslatorManager一旦被创建，之前所说的各ScriptTranslator派生类对象将被自动创建。通过BuiltinScriptTranslatorManager就可以方便地引用当前需要的ScriptTranslator对象来对脚本数据进行解读。
ScriptCompilerManager在其构造函数中创建ScriptCompiler对象实例之后，紧接着会创建BuiltinScriptTranslatorManager对象实例，并将对象指针保存在mBuiltinTranslatorManager中，同时在mManagers容器内作一个备份。
通过ScriptCompiler实例对象和BuiltinScriptTranslatorManager实例对象的创建，ScriptCompilerManager为保存在脚本对象中的脚本数据的解析，作好了准备。
posted on 2013-01-20 16:35 yzwalkman 阅读(1203) 评论(0) 编辑 收藏 举报
