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Diffstat (limited to 'mp/src/public/coordsize.h')
| -rw-r--r-- | mp/src/public/coordsize.h | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/mp/src/public/coordsize.h b/mp/src/public/coordsize.h new file mode 100644 index 00000000..39c04ebd --- /dev/null +++ b/mp/src/public/coordsize.h @@ -0,0 +1,98 @@ +//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose:
+//
+// $NoKeywords: $
+//
+//=============================================================================//
+
+#ifndef COORDSIZE_H
+#define COORDSIZE_H
+#pragma once
+
+#include "worldsize.h"
+
+// OVERALL Coordinate Size Limits used in COMMON.C MSG_*BitCoord() Routines (and someday the HUD)
+#define COORD_INTEGER_BITS 14
+#define COORD_FRACTIONAL_BITS 5
+#define COORD_DENOMINATOR (1<<(COORD_FRACTIONAL_BITS))
+#define COORD_RESOLUTION (1.0/(COORD_DENOMINATOR))
+
+// Special threshold for networking multiplayer origins
+#define COORD_INTEGER_BITS_MP 11
+#define COORD_FRACTIONAL_BITS_MP_LOWPRECISION 3
+#define COORD_DENOMINATOR_LOWPRECISION (1<<(COORD_FRACTIONAL_BITS_MP_LOWPRECISION))
+#define COORD_RESOLUTION_LOWPRECISION (1.0/(COORD_DENOMINATOR_LOWPRECISION))
+
+#define NORMAL_FRACTIONAL_BITS 11
+#define NORMAL_DENOMINATOR ( (1<<(NORMAL_FRACTIONAL_BITS)) - 1 )
+#define NORMAL_RESOLUTION (1.0/(NORMAL_DENOMINATOR))
+
+// this is limited by the network fractional bits used for coords
+// because net coords will be only be accurate to 5 bits fractional
+// Standard collision test epsilon
+// 1/32nd inch collision epsilon
+#define DIST_EPSILON (0.03125)
+
+// Verify that coordsize.h and worldsize.h are consistently defined
+#if (MAX_COORD_INTEGER != (1<<COORD_INTEGER_BITS) )
+#error MAX_COORD_INTEGER does not match COORD_INTEGER_BITS
+#endif
+
+///////////////////////////////////////////////////////////////////////////////////////////////////////
+// The following are Bit Packing Diagrams for client/server Coordinate BitField Messages
+///////////////////////////////////////////////////////////////////////////////////////////////////////
+//
+// "Coordinates" = +/-16384.9375 (21 Bits Max)
+//
+// | IntegerFlagBit:1 | FractionFlagBit:1 | SignBit:1 | IntegerField:14 | FractionPart:4 | Total
+// --------------------------------------------------------------------------------------------------
+// 0 0 - - - 2
+// 0 1 x - xxxx 7
+// 1 0 x xxxxxxxxxxxxx - 17
+// 1 1 x xxxxxxxxxxxxx xxxx 21
+//
+///////////////////////////////////////////////////////////////////////////////////////////////////////
+//
+// "Vec3Coordinate" = Up to 3 Coordinates (66 Bits Max)
+//
+// | NonZeroX:1 | NonZeroY:1 | NonZeroZ:1 | 0..3 "Coordinates" | BitField Total
+// -------------------------------------------------------------------------------
+// 0 0 0 - 3
+// 0 0 1 7..21 Bits 10..24
+// 0 1 0 7..21 Bits 10..24
+// 1 0 0 7..21 Bits 10..24
+// 0 1 1 14..42 Bits 17..45
+// 1 1 0 14..42 Bits 17..45
+// 1 0 1 14..42 Bits 17..45
+// 1 1 1 21..63 Bits 24..66
+//
+///////////////////////////////////////////////////////////////////////////////////////////////////////
+
+///////////////////////////////////////////////////////////////////////////////////////////////////////
+// The following are Bit Packing Diagrams for client/server Normal BitField Messages
+///////////////////////////////////////////////////////////////////////////////////////////////////////
+//
+// "Normals" = +/-1.0 (12 Bits Total)
+//
+// The only gotcha here is that normalization occurs so that
+// 011111111111 = +1.0 and 1111111111111 = -1.0
+//
+// | SignBit:1 | FractionPart:11 | Total
+// --------------------------------------------------------------------------------------------------
+// 1 xxxxxxxxxxx 12
+//
+///////////////////////////////////////////////////////////////////////////////////////////////////////
+//
+// "Vec3Normal" = Up to 3 Coordinates (27 Bits Max)
+//
+// | NonZeroX:1 | NonZeroY:1 | 0..2 "Coordinates" | Z Sign Bit | BitField Total
+// -------------------------------------------------------------------------------
+// 0 0 - x 3
+// 0 1 12 Bits x 14
+// 1 0 12 Bits x 14
+// 1 1 24 Bits x 27
+//
+///////////////////////////////////////////////////////////////////////////////////////////////////////
+
+#endif // COORDSIZE_H
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