The BodyInfo struct contains some read-only graphic properties of the body (e.g. axis aligned bounding box and center of mass offset), and plenty of per-body user available space, handy to bind user-side structs to a nudge physic body. More...

#include <nudge.h>

Public Attributes
UserData32Bit	user

float	aabb_center [3]

float	aabb_half_extents [3]

float	com_offset [3]

float	aabb_enlarged_radius

union {

int16_t aux_bodies [NUDGE_BODYINFO_STRUCT_NUM_AUX_BODIES]

union {

int32_t i32 [NUDGE_BODYINFO_STRUCT_NUM_AUX_BODIES/2]

uint32_t u32 [NUDGE_BODYINFO_STRUCT_NUM_AUX_BODIES/2]

int16_t i16 [NUDGE_BODYINFO_STRUCT_NUM_AUX_BODIES]

uint16_t u16 [NUDGE_BODYINFO_STRUCT_NUM_AUX_BODIES]

int8_t i8 [NUDGE_BODYINFO_STRUCT_NUM_AUX_BODIES *2]

uint8_t u8 [NUDGE_BODYINFO_STRUCT_NUM_AUX_BODIES *2]

} sk_user

};

Detailed Description

The BodyInfo struct contains some read-only graphic properties of the body (e.g. axis aligned bounding box and center of mass offset), and plenty of per-body user available space, handy to bind user-side structs to a nudge physic body.

Note: User custom field injection is allowed by the two definitions NUDGE_BODYINFO_STRUCT_EXTRA_FIELDS and NUDGE_BODYINFO_STRUCT_EXTRA_PADDING; the best place to do so is in a nudge config header file (setting its name in the project-scope definition: NUDGE_USER_CFG_FILE_NAME); It's possible to remove the default (per-body) UserData32Bit user field of this struct using the definition NUDGE_BODYINFO_STRUCT_NO_USER_DATA, and the 'aux_bodies[...] array / sk_user struct' by setting the NUDGE_BODYINFO_STRUCT_NUM_AUX_BODIES definition to zero

Member Data Documentation

◆ user

UserData32Bit nudge::BodyInfo::user

user data: a per-body user space in 7 different variable names that share the same space, so that ONLY one of them must be chosen and used

◆ aabb_center

float nudge::BodyInfo::aabb_center[3]

[read-only; unused by nudge.h] the axis aligned bounding box center of the body; note that the com_offset has not been stripped from it (it must be summed to strip it from aabb_center)

◆ aabb_half_extents

float nudge::BodyInfo::aabb_half_extents[3]

[read-only; unused by nudge.h] the axis aligned bounding box half extents of the body (it does not depend on com_offset)

◆ com_offset

float nudge::BodyInfo::com_offset[3]

[read-only] the center of mass offset of the body (it's only used in the calculate_graphic_transform_xxx(...) functions)

◆ aabb_enlarged_radius

float nudge::BodyInfo::aabb_enlarged_radius

[read-only] this radius is the sum of |com_offset|+|aabb_half_extents|, so that it can be used only with the body's transform position (no transform orientation required)

◆ aux_bodies

int16_t nudge::BodyInfo::aux_bodies[NUDGE_BODYINFO_STRUCT_NUM_AUX_BODIES]

user data that by default can be used for dynamic bodies ONLY, and that are reset to -1 every frame (but only for dynamic bodies in the c->active_bodies list); they can be used to store body indices, since they are currently in the [0,8192) range