Counter Strike : Global Offensive Source Code
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//========= Copyright � 1996-2012, Valve Corporation, All rights reserved. ============//
#ifndef CONSTANTS_HDR
#define CONSTANTS_HDR
#include "tier0/basetypes.h"
#include "resourcefile/resourcestream.h"
//! Global tuning constants based on meter-kilogram-seconds (MKS) units. Here adjusted
//! to inches for Source2 (1 inch ~ 2.5 cm <=> 1 cm ~ 0.4 inch <=> 1 m ~ 40 inch)
//---------------------------------------------------------------------------------------
// General
//---------------------------------------------------------------------------------------
//! A small distance used as collision detection and dynamics tolerance. It is chosen
//! to be numerically significant, but visually insignificant.
//! (This is 1/32 of an inch)
#define LINEAR_SLOP 0.03125f
//! A small angle used a collision detection and dynamics tolerance. It is chosen
//! to be numerically significant, but visually insignificant.
#define ANGULAR_SLOP (2.0f / 180.0f * M_PI)
//---------------------------------------------------------------------------------------
// Convex hulls
//---------------------------------------------------------------------------------------
//! The *desired* maximum number of vertices on a convex hull. The number of vertices is
//! chosen such that quadric shapes (e.g. cylinder and cones) can be approximated smoothly.
//! Do not change this value!
#define DESIRED_HULL_VERTICES 32
//! Maximum number of vertices supported at runtime on a convex hull.
//! Do not change this value!
#define MAX_HULL_VERTICES 256
//! Maximum number of half-edges supported at runtime on a convex hull.
//! Do not change this value!
#define MAX_HULL_HALFEDGES 256
//! Maximum number of faces supported at runtime on a convex hull.
//! Do not change this value!
#define MAX_HULL_FACES 256
//! The relative weld tolerance when pre-processing hull vertices.
//! This value is dimensionless!
#define RELATIVE_WELD_TOLERANCE 0.01f
//---------------------------------------------------------------------------------------
// Broadphase
//---------------------------------------------------------------------------------------
//! The maximum stack depth for iterative tree traversals.
#define STACK_SIZE 64
//! Constant to indicate an invalid proxy identifier
#define NULL_PROXY -1
//! The initial node capacity of the dynamic tree
#define INITIAL_NODE_CAPACITY 32
//! This is used to fatten AABBs in the dynamic tree. This allows proxies
//! to move by a small amount without triggering a tree adjustment.
//! (This is 0.1 [m] in MKS)
#define BOUNDS_EXTENSION 4.0f
//! This is used to fatten AABBs in the dynamic tree. This is used to predict
//! the future position based on the current displacement.
//! (This is a dimensionless multiplier)
#define BOUNDS_MULTIPLIER 2.0f
//---------------------------------------------------------------------------------------
// Collision
//---------------------------------------------------------------------------------------
//! The maximum number of contact points between two touching shapes. Do not change this value!
#define MAX_CONTACT_POINTS 4
//! The number of buckets used in the mesh SAH builder
#define SAH_BUILDER_BUCKET_COUNT 32
//! The desired number of triangles in a leaf node of the mesh BVH
#define DESIRED_TRIANGLES_PER_LEAF 4
//! The maximum number of triangles in a leaf node of the mesh BVH
#define MAXIMUM_TRIANGLES_PER_LEAF 8
//! The maximum number of iteration of the TOI root finder
#define MAX_ROOT_FINDER_ITERATIONS 64
//! The radius of the hull/mesh shape skin. This should not be modified. Making
//! this smaller means polytopes will have an insufficient buffer for continuous
//! collision. Making it larger may create artifacts for vertex collision.
#define CONVEX_RADIUS (2.0f * LINEAR_SLOP)
//! The maximum number of sub-steps per contact in a continuous physics simulation.
#define MAX_SUBSTEPS 4
//---------------------------------------------------------------------------------------
// Dynamics
//---------------------------------------------------------------------------------------
//! Define default solver position iterations.
#define DEFAULT_POSITION_ITERATIONS 2
//! Define default solver velocity iterations.
#define DEFAULT_VELOCITY_ITERATIONS 8
//! Define default gravity.
//! (This is 9 [m/s^2] in MKS)
#define DEFAULT_GRAVITY 360.0f
//! Default air density, taken from CDragController
#define DEFAULT_AIR_DENSITY 2.0f;
//! The maximum linear velocity of a body. This limit is very large and is used
//! to prevent numerical problems. You shouldn't need to adjust this.
#define MAX_TRANSLATION 80.0f
//! The maximum angular velocity of a body. This limit is very large and is used
//! to prevent numerical problems. You shouldn't need to adjust this.
#define MAX_ROTATION (0.25f * M_PI)
//! A velocity threshold for elastic collisions. Any collision with a relative linear
//! velocity below this threshold will be treated as inelastic.
//! (This is 1 [m/s] in MKS)
#define VELOCITY_THRESHOLD 40.0f
//! The maximum linear position correction used when solving constraints. This helps to
//! prevent overshoot.
//! (This is 0.2 [m] in MKS)
#define MAX_LINEAR_CORRECTION 8.0f
//! The maximum angular position correction used when solving constraints. This helps to
//! prevent overshoot.
#define MAX_ANGULAR_CORRECTION (8.0f / 180.0f * M_PI)
//! A Baumgarte like factor when using projection for constraint stabilization. This only
//! effects contacts and limits. We want to avoid overshooting so this value should be in
//! range 0.1 - 0.2. Overshooting can result in loosing contacts and warm-starting information
//! which has a bunch of negative side effects (e.g. jitter and bad friction).
//! (This is a dimensionless multiplier)
#define TOI_BAUMGARTE 0.75f
#define POSITION_BAUMGARTE 0.2f
//! Factor when using Baumgarte stabilization to stabilize velocity constraints. This will
//! effect all joints and add momentum when enabled.
//! (This is a dimensionless multiplier)
#define VELOCITY_BAUMGARTE 0.1f
//---------------------------------------------------------------------------------------
// Sleeping
//---------------------------------------------------------------------------------------
//! The time in seconds that a body must be still before it will go to sleep.
#define TIME_TO_SLEEP 0.5f
//! A body cannot sleep if its linear velocity is above this tolerance.
//! (This is 0.01 [m/s] in MKS)
#define LINEAR_SLEEP_TOLERANCE 0.4f
//! A body cannot sleep if its angular velocity is above this tolerance.
#define ANGULAR_SLEEP_TOLERANCE (2.0f / 180.0f * M_PI)
//---------------------------------------------------------------------------------------
// Default joint parameter
//---------------------------------------------------------------------------------------
#define DEFAULT_JOINT_CFM float( 0.0f )
#define DEFAULT_JOINT_ERP float( 0.1f )
// dummy schema data: workaround for a build dependency issue
schema struct RnDummy_t { int32 m_nDummy;};
#endif
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