open_toontown_panda3d/panda/src/physx/physxSceneDesc.cxx

/**
 * PANDA 3D SOFTWARE
 * Copyright (c) Carnegie Mellon University.  All rights reserved.
 *
 * All use of this software is subject to the terms of the revised BSD
 * license.  You should have received a copy of this license along
 * with this source code in a file named "LICENSE."
 *
 * @file physxSceneDesc.cxx
 * @author enn0x
 * @date 2009-09-05
 */

#include "physxSceneDesc.h"
#include "physxManager.h"
#include "physxBounds3.h"

/**
 * Sets the gravity vector.
 */
void PhysxSceneDesc::
set_gravity(const LVector3f &gravity) {

  nassertv_always(!gravity.is_nan());
  _desc.gravity = PhysxManager::vec3_to_nxVec3(gravity);
}

/**
 * Get the gravity vector.
 */
LVector3f PhysxSceneDesc::
get_gravity() const {

  return PhysxManager::nxVec3_to_vec3(_desc.gravity);
}

/**
 * Raise or lower individual scene flags.
 */
void PhysxSceneDesc::
set_flag(const PhysxSceneFlag flag, bool value) {

  if (value == true) {
    _desc.flags |= flag;
  }
  else {
    _desc.flags &= ~(flag);
  }
}

/**
 * Returns the specified scene flag.
 */
bool PhysxSceneDesc::
get_flag(const PhysxSceneFlag flag) const {

  return (_desc.flags & flag) ? true : false;
}

/**
 * Set the max scene bounds.
 *
 * If scene bounds are provided (maxBounds in the descriptor), the SDK takes
 * advantage of this information to accelerate scene-level collision queries
 * (e.g.  raycasting). When using maxBounds, you have to make sure created
 * objects stay within the scene bounds.  In particular, the position of
 * dynamic shapes should stay within the provided bounds.  Otherwise the
 * shapes outside the bounds will not be taken into account by all scene
 * queries (raycasting, sweep tests, overlap tests, etc). They will
 * nonetheless still work correctly for the main physics simulation.
 */
void PhysxSceneDesc::
set_max_bounds(PhysxBounds3 &bounds) {

  _desc.maxBounds = &(bounds._bounds);
}

/**
 *
 */
PhysxBounds3 PhysxSceneDesc::
get_max_bounds() const {
  assert(false /* Not implemented */);

  // PhysxBounds3 value; value._bounds = *(_desc.maxBounds); return value;
  return PhysxBounds3();
}

/**
 * Defines the structure used to store static objects.
 */
void PhysxSceneDesc::
set_static_structure(PhysxPruningStructure value) {

  _desc.staticStructure = (NxPruningStructure)value;
}

/**
 * Defines the subdivision level for acceleration structures used for scene
 * queries.  This is only used when maxBounds are defined!
 */
void PhysxSceneDesc::
set_dynamic_structure(PhysxPruningStructure value) {

  _desc.dynamicStructure = (NxPruningStructure)value;
}

/**
 * Returns the structure used to store static objects.
 */
PhysxEnums::PhysxPruningStructure PhysxSceneDesc::
get_static_structure() const {

  return (PhysxPruningStructure)_desc.staticStructure;
}

/**
 * Returns the subdivision level for acceleration structures used for scene
 * queries.
 */
PhysxEnums::PhysxPruningStructure PhysxSceneDesc::
get_dynamic_structure() const {

  return (PhysxPruningStructure)_desc.dynamicStructure;
}

/**
 * Defines the subdivision level for acceleration structures used for scene
 * queries.  This is only used when maxBounds are defined!
 */
void PhysxSceneDesc::
set_subdivision_level(unsigned int value) {

  _desc.subdivisionLevel = (NxU32)value;
}

/**
 * Defines the number of broadphase cells along the grid x-axis.  Must be
 * power of two.  Max is 8 at the moment.  The broadphase type must be set to
 * BPT_sap_multi for this parameter to have an effect.
 */
void PhysxSceneDesc::
set_num_grid_cells_x(unsigned int value) {

  _desc.nbGridCellsX = (NxU32)value;
}

/**
 * Defines the number of broadphase cells along the grid y-axis.  Must be
 * power of two.  Max is 8 at the moment.  The broadphase type must be set to
 * BPT_sap_multi for this parameter to have an effect.
 */
void PhysxSceneDesc::
set_num_grid_cells_y(unsigned int value) {

  _desc.nbGridCellsY = (NxU32)value;
}

/**
 * Returns the subdivision level for acceleration structures used for scene
 * queries.
 */
unsigned int PhysxSceneDesc::
get_subdivision_level() const {

  return _desc.subdivisionLevel;
}

/**
 * Returns the number of broadphase cells along the grid x-axis.
 */
unsigned int PhysxSceneDesc::
get_num_grid_cells_x() const {

  return _desc.nbGridCellsX;
}

/**
 * Returns the number of broadphase cells along the grid y-axis.
 */
unsigned int PhysxSceneDesc::
get_num_grid_cells_y() const {

  return _desc.nbGridCellsY;
}

/**
 * Defines which type of broadphase to use.
 *
 * (1) BPT_sap_single: A sweep-and-prune (SAP) algorithm to find pairs of
 * potentially colliding shapes.
 *
 * (2) BPT_sap_multi: A multi sweep-and-prune algorithm to find pairs of
 * potentially colliding shapes.  Uses a configurable 2D grid to divide the
 * scene space into cells.  The potentially overlapping shape pairs are
 * detected in each cell and the information is merged together.  This
 * approach is usually faster than BPT_sap_single in scenarios with many
 * shapes and a high creation/deletion rate of shapes.  However, the amount of
 * memory required is considerably higher depending on the number of grid
 * cells used.  The following extra parameters need to be defined: -
 * PhysxSceneDesc.set_max_bounds - PhysxSceneDesc.set_num_grid_cells_x -
 * PhysxSceneDesc.set_num_grid_cells_y (the scene up direction is set via
 * config options)
 */
void PhysxSceneDesc::
set_bp_type(PhysxBroadPhaseType value) {

  _desc.bpType = (NxBroadPhaseType)value;
}

/**
 * Returns the type of broadphase to use.
 */
PhysxEnums::PhysxBroadPhaseType PhysxSceneDesc::
get_bp_type() const {

  return (PhysxBroadPhaseType)_desc.bpType;
}