source: GTP/trunk/App/Demos/Geom/OgreStuff/include/OgreCommon.h @ 1812

Revision 1812, 13.9 KB checked in by gumbau, 18 years ago (diff)
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[1812]1/*
2-----------------------------------------------------------------------------
3This source file is part of OGRE
4    (Object-oriented Graphics Rendering Engine)
5For the latest info, see http://www.ogre3d.org/
6
7Copyright (c) 2000-2005 The OGRE Team
8Also see acknowledgements in Readme.html
9
10This program is free software; you can redistribute it and/or modify it under
11the terms of the GNU Lesser General Public License as published by the Free Software
12Foundation; either version 2 of the License, or (at your option) any later
13version.
14
15This program is distributed in the hope that it will be useful, but WITHOUT
16ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
17FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
18
19You should have received a copy of the GNU Lesser General Public License along with
20this program; if not, write to the Free Software Foundation, Inc., 59 Temple
21Place - Suite 330, Boston, MA 02111-1307, USA, or go to
22http://www.gnu.org/copyleft/lesser.txt.
23-----------------------------------------------------------------------------
24*/
25#ifndef __Common_H__
26#define __Common_H__
27// Common stuff
28
29#include <utility>
30
31namespace Ogre {
32
33
34    /** Comparison functions used for the depth/stencil buffer operations and
35                others. */
36    enum CompareFunction
37    {
38        CMPF_ALWAYS_FAIL,
39        CMPF_ALWAYS_PASS,
40        CMPF_LESS,
41        CMPF_LESS_EQUAL,
42        CMPF_EQUAL,
43        CMPF_NOT_EQUAL,
44        CMPF_GREATER_EQUAL,
45        CMPF_GREATER
46    };
47
48    /** High-level filtering options providing shortcuts to settings the
49        minification, magnification and mip filters. */
50    enum TextureFilterOptions
51    {
52        /// Equal to: min=FO_POINT, mag=FO_POINT, mip=FO_NONE
53        TFO_NONE,
54        /// Equal to: min=FO_LINEAR, mag=FO_LINEAR, mip=FO_POINT
55        TFO_BILINEAR,
56        /// Equal to: min=FO_LINEAR, mag=FO_LINEAR, mip=FO_LINEAR
57        TFO_TRILINEAR,
58        /// Equal to: min=FO_ANISOTROPIC, max=FO_ANISOTROPIC, mip=FO_LINEAR
59                TFO_ANISOTROPIC
60    };
61
62    enum FilterType
63    {
64        /// The filter used when shrinking a texture
65        FT_MIN,
66        /// The filter used when magnifiying a texture
67        FT_MAG,
68        /// The filter used when determining the mipmap
69        FT_MIP
70    };
71    /** Filtering options for textures / mipmaps. */
72    enum FilterOptions
73    {
74        /// No filtering, used for FILT_MIP to turn off mipmapping
75        FO_NONE,
76        /// Use the closest pixel
77        FO_POINT,
78        /// Average of a 2x2 pixel area, denotes bilinear for MIN and MAG, trilinear for MIP
79        FO_LINEAR,
80        /// Similar to FO_LINEAR, but compensates for the angle of the texture plane
81        FO_ANISOTROPIC
82    };
83
84    /** Light shading modes. */
85    enum ShadeOptions
86    {
87        SO_FLAT,
88        SO_GOURAUD,
89        SO_PHONG
90    };
91
92    /** Fog modes. */
93    enum FogMode
94    {
95        /// No fog. Duh.
96        FOG_NONE,
97        /// Fog density increases  exponentially from the camera (fog = 1/e^(distance * density))
98        FOG_EXP,
99        /// Fog density increases at the square of FOG_EXP, i.e. even quicker (fog = 1/e^(distance * density)^2)
100        FOG_EXP2,
101        /// Fog density increases linearly between the start and end distances
102        FOG_LINEAR
103    };
104
105    /** Hardware culling modes based on vertex winding.
106        This setting applies to how the hardware API culls triangles it is sent. */
107    enum CullingMode
108    {
109        /// Hardware never culls triangles and renders everything it receives.
110        CULL_NONE = 1,
111        /// Hardware culls triangles whose vertices are listed clockwise in the view (default).
112        CULL_CLOCKWISE = 2,
113        /// Hardware culls triangles whose vertices are listed anticlockwise in the view.
114        CULL_ANTICLOCKWISE = 3
115    };
116
117    /** Manual culling modes based on vertex normals.
118        This setting applies to how the software culls triangles before sending them to the
119                hardware API. This culling mode is used by scene managers which choose to implement it -
120                normally those which deal with large amounts of fixed world geometry which is often
121                planar (software culling movable variable geometry is expensive). */
122    enum ManualCullingMode
123    {
124        /// No culling so everything is sent to the hardware.
125        MANUAL_CULL_NONE = 1,
126        /// Cull triangles whose normal is pointing away from the camera (default).
127        MANUAL_CULL_BACK = 2,
128        /// Cull triangles whose normal is pointing towards the camera.
129        MANUAL_CULL_FRONT = 3
130    };
131
132    /** Enumerates the wave types usable with the Ogre engine. */
133    enum WaveformType
134    {
135        /// Standard sine wave which smoothly changes from low to high and back again.
136        WFT_SINE,
137        /// An angular wave with a constant increase / decrease speed with pointed peaks.
138        WFT_TRIANGLE,
139        /// Half of the time is spent at the min, half at the max with instant transition between.
140        WFT_SQUARE,
141        /// Gradual steady increase from min to max over the period with an instant return to min at the end.
142        WFT_SAWTOOTH,
143        /// Gradual steady decrease from max to min over the period, with an instant return to max at the end.
144        WFT_INVERSE_SAWTOOTH,
145                /// Pulse Width Modulation. Works like WFT_SQUARE, except the high to low transition is controlled by duty cycle.
146                /// With a duty cycle of 50% (0.5) will give the same output as WFT_SQUARE.
147                WFT_PWM
148    };
149
150    /** The polygon mode to use when rasterising. */
151    enum PolygonMode
152    {
153                /// Only points are rendered.
154        PM_POINTS = 1,
155                /// Wireframe models are rendered.
156        PM_WIREFRAME = 2,
157                /// Solid polygons are rendered.
158        PM_SOLID = 3
159    };
160
161    /** An enumeration of broad shadow techniques */
162    enum ShadowTechnique
163    {
164        /** No shadows */
165        SHADOWTYPE_NONE = 0x00,
166                /** Mask for additive shadows (not for direct use, use  SHADOWTYPE_ enum instead)
167                */
168                SHADOWDETAILTYPE_ADDITIVE = 0x01,
169                /** Mask for modulative shadows (not for direct use, use  SHADOWTYPE_ enum instead)
170                */
171                SHADOWDETAILTYPE_MODULATIVE = 0x02,
172                /** Mask for stencil shadows (not for direct use, use  SHADOWTYPE_ enum instead)
173                */
174                SHADOWDETAILTYPE_STENCIL = 0x10,
175                /** Mask for texture shadows (not for direct use, use  SHADOWTYPE_ enum instead)
176                */
177                SHADOWDETAILTYPE_TEXTURE = 0x20,
178               
179        /** Stencil shadow technique which renders all shadow volumes as
180            a modulation after all the non-transparent areas have been
181            rendered. This technique is considerably less fillrate intensive
182            than the additive stencil shadow approach when there are multiple
183            lights, but is not an accurate model.
184        */
185        SHADOWTYPE_STENCIL_MODULATIVE = 0x12,
186        /** Stencil shadow technique which renders each light as a separate
187            additive pass to the scene. This technique can be very fillrate
188            intensive because it requires at least 2 passes of the entire
189            scene, more if there are multiple lights. However, it is a more
190            accurate model than the modulative stencil approach and this is
191            especially apparant when using coloured lights or bump mapping.
192        */
193        SHADOWTYPE_STENCIL_ADDITIVE = 0x11,
194        /** Texture-based shadow technique which involves a monochrome render-to-texture
195            of the shadow caster and a projection of that texture onto the
196            shadow receivers as a modulative pass.
197        */
198        SHADOWTYPE_TEXTURE_MODULATIVE = 0x22,
199               
200        /** Texture-based shadow technique which involves a monochrome render-to-texture
201            of the shadow caster and a projection of that texture onto the
202            shadow receivers, built up per light as additive passes.
203                        This technique can be very fillrate intensive because it requires numLights + 2
204                        passes of the entire scene. However, it is a more accurate model than the
205                        modulative approach and this is especially apparant when using coloured lights
206                        or bump mapping.
207        */
208        SHADOWTYPE_TEXTURE_ADDITIVE = 0x21
209    };
210
211    /** An enumeration describing which material properties should track the vertex colours */
212    typedef int TrackVertexColourType;
213    enum TrackVertexColourEnum {
214        TVC_NONE        = 0x0,
215        TVC_AMBIENT     = 0x1,       
216        TVC_DIFFUSE     = 0x2,
217        TVC_SPECULAR    = 0x4,
218        TVC_EMISSIVE    = 0x8
219    };
220
221    /** Sort mode for billboard-set and particle-system */
222    enum SortMode
223    {
224        /** Sort by direction of the camera */
225        SM_DIRECTION,
226        /** Sort by distance from the camera */
227        SM_DISTANCE
228    };
229
230    /** Defines the frame buffer types. */
231    enum FrameBufferType {
232        FBT_COLOUR  = 0x1,
233        FBT_DEPTH   = 0x2,
234        FBT_STENCIL = 0x4
235    };
236   
237       
238    typedef std::vector<Light*> LightList;
239
240    typedef std::map<String, bool> UnaryOptionList;
241    typedef std::map<String, String> BinaryOptionList;
242
243        /// Name / value parameter pair (first = name, second = value)
244        typedef std::map<String, String> NameValuePairList;
245
246    /// Alias / Texture name pair (first = alias, second = texture name)
247    typedef std::map<String, String> AliasTextureNamePairList;
248
249        template< typename T > struct TRect
250        {
251          T left, top, right, bottom;
252          TRect() {}
253          TRect( T const & l, T const & t, T const & r, T const & b )
254            : left( l ), top( t ), right( r ), bottom( b )
255          {
256          }
257          TRect( TRect const & o )
258            : left( o.left ), top( o.top ), right( o.right ), bottom( o.bottom )
259          {
260          }
261          TRect & operator=( TRect const & o )
262          {
263            left = o.left;
264            top = o.top;
265            right = o.right;
266            bottom = o.bottom;
267            return *this;
268          }
269          T width() const
270          {
271            return right - left;
272          }
273          T height() const
274          {
275            return bottom - top;
276          }
277        };
278
279        /** Structure used to define a rectangle in a 2-D floating point space.
280        */
281        typedef TRect<float> FloatRect;
282
283        /** Structure used to define a rectangle in a 2-D integer space.
284        */
285        typedef TRect< long > Rect;
286
287        /** Structure used to define a box in a 3-D integer space.
288                Note that the left, top, and front edges are included but the right,
289                bottom and top ones are not.
290         */
291        struct Box
292        {
293            size_t left, top, right, bottom, front, back;
294                        /// Parameterless constructor for setting the members manually
295            Box()
296            {
297            }
298            /** Define a box from left, top, right and bottom coordinates
299                This box will have depth one (front=0 and back=1).
300                @param  l       x value of left edge
301                @param  t       y value of top edge
302                @param  r       x value of right edge
303                @param  b       y value of bottom edge
304                @note Note that the left, top, and front edges are included
305                                but the right, bottom and top ones are not.
306            */
307            Box( size_t l, size_t t, size_t r, size_t b ):
308                left(l),
309                top(t),   
310                right(r),
311                bottom(b),
312                front(0),
313                back(1)
314            {
315                        assert(right >= left && bottom >= top && back >= front);
316            }
317            /** Define a box from left, top, front, right, bottom and back
318                coordinates.
319                @param  l       x value of left edge
320                @param  t       y value of top edge
321                @param  ff  z value of front edge
322                @param  r       x value of right edge
323                @param  b       y value of bottom edge
324                @param  bb  z value of back edge
325                @note Note that the left, top, and front edges are included
326                                but the right, bottom and top ones are not.
327            */
328            Box( size_t l, size_t t, size_t ff, size_t r, size_t b, size_t bb ):
329                left(l),
330                top(t),   
331                right(r),
332                bottom(b),
333                front(ff),
334                back(bb)
335            {
336                        assert(right >= left && bottom >= top && back >= front);
337            }
338           
339            /// Return true if the other box is a part of this one
340            bool contains(const Box &def) const
341            {
342                return (def.left >= left && def.top >= top && def.front >= front &&
343                                        def.right <= right && def.bottom <= bottom && def.back <= back);
344            }
345           
346            /// Get the width of this box
347            size_t getWidth() const { return right-left; }
348            /// Get the height of this box
349            size_t getHeight() const { return bottom-top; }
350            /// Get the depth of this box
351            size_t getDepth() const { return back-front; }
352        };
353
354   
355       
356        /** Locate command-line options of the unary form '-blah' and of the
357        binary form '-blah foo', passing back the index of the next non-option.
358    @param numargs, argv The standard parameters passed to the main method
359    @param unaryOptList Map of unary options (ie those that do not require a parameter).
360        Should be pre-populated with, for example '-e' in the key and false in the
361        value. Options which are found will be set to true on return.
362    @param binOptList Map of binnary options (ie those that require a parameter
363        e.g. '-e afile.txt').
364        Should be pre-populated with, for example '-e' and the default setting.
365        Options which are found will have the value updated.
366    */
367    int _OgreExport findCommandLineOpts(int numargs, char** argv, UnaryOptionList& unaryOptList,
368        BinaryOptionList& binOptList);
369
370}
371
372#endif
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