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godot/main/tests/test_physics.cpp

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/*************************************************************************/
/* test_physics.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md). */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#include "test_physics.h"
#include "core/map.h"
#include "core/math/math_funcs.h"
#include "core/math/quick_hull.h"
#include "core/os/main_loop.h"
#include "core/os/os.h"
#include "core/print_string.h"
#include "servers/physics_server.h"
#include "servers/visual_server.h"
class TestPhysicsMainLoop : public MainLoop {
GDCLASS(TestPhysicsMainLoop, MainLoop);
enum {
LINK_COUNT = 20,
};
RID test_cube;
RID plane;
RID sphere;
RID light;
RID camera;
RID mover;
RID scenario;
RID space;
RID character;
float ofs_x, ofs_y;
Point2 joy_direction;
List<RID> bodies;
Map<PhysicsServer::ShapeType, RID> type_shape_map;
Map<PhysicsServer::ShapeType, RID> type_mesh_map;
void body_changed_transform(Object *p_state, RID p_visual_instance) {
PhysicsDirectBodyState *state = (PhysicsDirectBodyState *)p_state;
VisualServer *vs = VisualServer::get_singleton();
Transform t = state->get_transform();
vs->instance_set_transform(p_visual_instance, t);
}
bool quit;
protected:
static void _bind_methods() {
ClassDB::bind_method("body_changed_transform", &TestPhysicsMainLoop::body_changed_transform);
}
RID create_body(PhysicsServer::ShapeType p_shape, PhysicsServer::BodyMode p_body, const Transform p_location, bool p_active_default = true, const Transform &p_shape_xform = Transform()) {
VisualServer *vs = VisualServer::get_singleton();
PhysicsServer *ps = PhysicsServer::get_singleton();
RID mesh_instance = vs->instance_create2(type_mesh_map[p_shape], scenario);
RID body = ps->body_create(p_body, !p_active_default);
ps->body_set_space(body, space);
ps->body_set_param(body, PhysicsServer::BODY_PARAM_BOUNCE, 0.0);
//todo set space
ps->body_add_shape(body, type_shape_map[p_shape]);
ps->body_set_force_integration_callback(body, this, "body_changed_transform", mesh_instance);
ps->body_set_state(body, PhysicsServer::BODY_STATE_TRANSFORM, p_location);
bodies.push_back(body);
if (p_body == PhysicsServer::BODY_MODE_STATIC) {
vs->instance_set_transform(mesh_instance, p_location);
}
return body;
}
RID create_static_plane(const Plane &p_plane) {
PhysicsServer *ps = PhysicsServer::get_singleton();
RID plane_shape = ps->shape_create(PhysicsServer::SHAPE_PLANE);
ps->shape_set_data(plane_shape, p_plane);
RID b = ps->body_create(PhysicsServer::BODY_MODE_STATIC);
ps->body_set_space(b, space);
//todo set space
ps->body_add_shape(b, plane_shape);
return b;
}
void configure_body(RID p_body, float p_mass, float p_friction, float p_bounce) {
PhysicsServer *ps = PhysicsServer::get_singleton();
ps->body_set_param(p_body, PhysicsServer::BODY_PARAM_MASS, p_mass);
ps->body_set_param(p_body, PhysicsServer::BODY_PARAM_FRICTION, p_friction);
ps->body_set_param(p_body, PhysicsServer::BODY_PARAM_BOUNCE, p_bounce);
}
void init_shapes() {
VisualServer *vs = VisualServer::get_singleton();
PhysicsServer *ps = PhysicsServer::get_singleton();
/* SPHERE SHAPE */
RID sphere_mesh = vs->make_sphere_mesh(10, 20, 0.5);
type_mesh_map[PhysicsServer::SHAPE_SPHERE] = sphere_mesh;
RID sphere_shape = ps->shape_create(PhysicsServer::SHAPE_SPHERE);
ps->shape_set_data(sphere_shape, 0.5);
type_shape_map[PhysicsServer::SHAPE_SPHERE] = sphere_shape;
/* BOX SHAPE */
PoolVector<Plane> box_planes = Geometry::build_box_planes(Vector3(0.5, 0.5, 0.5));
RID box_mesh = vs->mesh_create();
Geometry::MeshData box_data = Geometry::build_convex_mesh(box_planes);
vs->mesh_add_surface_from_mesh_data(box_mesh, box_data);
type_mesh_map[PhysicsServer::SHAPE_BOX] = box_mesh;
RID box_shape = ps->shape_create(PhysicsServer::SHAPE_BOX);
ps->shape_set_data(box_shape, Vector3(0.5, 0.5, 0.5));
type_shape_map[PhysicsServer::SHAPE_BOX] = box_shape;
/* CAPSULE SHAPE */
PoolVector<Plane> capsule_planes = Geometry::build_capsule_planes(0.5, 0.7, 12, Vector3::AXIS_Z);
RID capsule_mesh = vs->mesh_create();
Geometry::MeshData capsule_data = Geometry::build_convex_mesh(capsule_planes);
vs->mesh_add_surface_from_mesh_data(capsule_mesh, capsule_data);
type_mesh_map[PhysicsServer::SHAPE_CAPSULE] = capsule_mesh;
RID capsule_shape = ps->shape_create(PhysicsServer::SHAPE_CAPSULE);
Dictionary capsule_params;
capsule_params["radius"] = 0.5;
capsule_params["height"] = 1.4;
ps->shape_set_data(capsule_shape, capsule_params);
type_shape_map[PhysicsServer::SHAPE_CAPSULE] = capsule_shape;
/* CONVEX SHAPE */
PoolVector<Plane> convex_planes = Geometry::build_cylinder_planes(0.5, 0.7, 5, Vector3::AXIS_Z);
RID convex_mesh = vs->mesh_create();
Geometry::MeshData convex_data = Geometry::build_convex_mesh(convex_planes);
QuickHull::build(convex_data.vertices, convex_data);
vs->mesh_add_surface_from_mesh_data(convex_mesh, convex_data);
type_mesh_map[PhysicsServer::SHAPE_CONVEX_POLYGON] = convex_mesh;
RID convex_shape = ps->shape_create(PhysicsServer::SHAPE_CONVEX_POLYGON);
ps->shape_set_data(convex_shape, convex_data.vertices);
type_shape_map[PhysicsServer::SHAPE_CONVEX_POLYGON] = convex_shape;
}
void make_trimesh(Vector<Vector3> p_faces, const Transform &p_xform = Transform()) {
VisualServer *vs = VisualServer::get_singleton();
PhysicsServer *ps = PhysicsServer::get_singleton();
RID trimesh_shape = ps->shape_create(PhysicsServer::SHAPE_CONCAVE_POLYGON);
ps->shape_set_data(trimesh_shape, p_faces);
p_faces = ps->shape_get_data(trimesh_shape); // optimized one
Vector<Vector3> normals; // for drawing
for (int i = 0; i < p_faces.size() / 3; i++) {
Plane p(p_faces[i * 3 + 0], p_faces[i * 3 + 1], p_faces[i * 3 + 2]);
normals.push_back(p.normal);
normals.push_back(p.normal);
normals.push_back(p.normal);
}
RID trimesh_mesh = vs->mesh_create();
Array d;
d.resize(VS::ARRAY_MAX);
d[VS::ARRAY_VERTEX] = p_faces;
d[VS::ARRAY_NORMAL] = normals;
vs->mesh_add_surface_from_arrays(trimesh_mesh, VS::PRIMITIVE_TRIANGLES, d);
RID triins = vs->instance_create2(trimesh_mesh, scenario);
RID tribody = ps->body_create(PhysicsServer::BODY_MODE_STATIC);
ps->body_set_space(tribody, space);
//todo set space
ps->body_add_shape(tribody, trimesh_shape);
Transform tritrans = p_xform;
ps->body_set_state(tribody, PhysicsServer::BODY_STATE_TRANSFORM, tritrans);
vs->instance_set_transform(triins, tritrans);
}
void make_grid(int p_width, int p_height, float p_cellsize, float p_cellheight, const Transform &p_xform = Transform()) {
Vector<Vector<float>> grid;
grid.resize(p_width);
for (int i = 0; i < p_width; i++) {
grid.write[i].resize(p_height);
for (int j = 0; j < p_height; j++) {
grid.write[i].write[j] = 1.0 + Math::random(-p_cellheight, p_cellheight);
}
}
Vector<Vector3> faces;
for (int i = 1; i < p_width; i++) {
for (int j = 1; j < p_height; j++) {
#define MAKE_VERTEX(m_x, m_z) \
faces.push_back(Vector3((m_x - p_width / 2) * p_cellsize, grid[m_x][m_z], (m_z - p_height / 2) * p_cellsize))
MAKE_VERTEX(i, j - 1);
MAKE_VERTEX(i, j);
MAKE_VERTEX(i - 1, j);
MAKE_VERTEX(i - 1, j - 1);
MAKE_VERTEX(i, j - 1);
MAKE_VERTEX(i - 1, j);
}
}
make_trimesh(faces, p_xform);
}
public:
virtual void input_event(const Ref<InputEvent> &p_event) {
Ref<InputEventMouseMotion> mm = p_event;
if (mm.is_valid() && mm->get_button_mask() & 4) {
ofs_y -= mm->get_relative().y / 200.0;
ofs_x += mm->get_relative().x / 200.0;
}
if (mm.is_valid() && mm->get_button_mask() & 1) {
float y = -mm->get_relative().y / 20.0;
float x = mm->get_relative().x / 20.0;
if (mover.is_valid()) {
PhysicsServer *ps = PhysicsServer::get_singleton();
Transform t = ps->body_get_state(mover, PhysicsServer::BODY_STATE_TRANSFORM);
t.origin += Vector3(x, y, 0);
ps->body_set_state(mover, PhysicsServer::BODY_STATE_TRANSFORM, t);
}
}
}
virtual void request_quit() {
quit = true;
}
virtual void init() {
ofs_x = ofs_y = 0;
init_shapes();
PhysicsServer *ps = PhysicsServer::get_singleton();
space = ps->space_create();
ps->space_set_active(space, true);
VisualServer *vs = VisualServer::get_singleton();
/* LIGHT */
RID lightaux = vs->directional_light_create();
scenario = vs->scenario_create();
vs->light_set_shadow(lightaux, true);
light = vs->instance_create2(lightaux, scenario);
Transform t;
t.rotate(Vector3(1.0, 0, 0), 0.6);
vs->instance_set_transform(light, t);
/* CAMERA */
camera = vs->camera_create();
RID viewport = vs->viewport_create();
Size2i screen_size = OS::get_singleton()->get_window_size();
vs->viewport_set_size(viewport, screen_size.x, screen_size.y);
vs->viewport_attach_to_screen(viewport, Rect2(Vector2(), screen_size));
vs->viewport_set_active(viewport, true);
vs->viewport_attach_camera(viewport, camera);
vs->viewport_set_scenario(viewport, scenario);
vs->camera_set_perspective(camera, 60, 0.1, 40.0);
vs->camera_set_transform(camera, Transform(Basis(), Vector3(0, 9, 12)));
Transform gxf;
gxf.basis.scale(Vector3(1.4, 0.4, 1.4));
gxf.origin = Vector3(-2, 1, -2);
make_grid(5, 5, 2.5, 1, gxf);
test_fall();
quit = false;
}
virtual bool iteration(float p_time) {
if (mover.is_valid()) {
static float joy_speed = 10;
PhysicsServer *ps = PhysicsServer::get_singleton();
Transform t = ps->body_get_state(mover, PhysicsServer::BODY_STATE_TRANSFORM);
t.origin += Vector3(joy_speed * joy_direction.x * p_time, -joy_speed * joy_direction.y * p_time, 0);
ps->body_set_state(mover, PhysicsServer::BODY_STATE_TRANSFORM, t);
};
Transform cameratr;
cameratr.rotate(Vector3(0, 1, 0), ofs_x);
cameratr.rotate(Vector3(1, 0, 0), -ofs_y);
cameratr.translate(Vector3(0, 2, 8));
VisualServer *vs = VisualServer::get_singleton();
vs->camera_set_transform(camera, cameratr);
return quit;
}
virtual void finish() {
}
void test_joint() {
}
void test_hinge() {
}
void test_character() {
VisualServer *vs = VisualServer::get_singleton();
PhysicsServer *ps = PhysicsServer::get_singleton();
PoolVector<Plane> capsule_planes = Geometry::build_capsule_planes(0.5, 1, 12, 5, Vector3::AXIS_Y);
RID capsule_mesh = vs->mesh_create();
Geometry::MeshData capsule_data = Geometry::build_convex_mesh(capsule_planes);
vs->mesh_add_surface_from_mesh_data(capsule_mesh, capsule_data);
type_mesh_map[PhysicsServer::SHAPE_CAPSULE] = capsule_mesh;
RID capsule_shape = ps->shape_create(PhysicsServer::SHAPE_CAPSULE);
Dictionary capsule_params;
capsule_params["radius"] = 0.5;
capsule_params["height"] = 1;
Transform shape_xform;
shape_xform.rotate(Vector3(1, 0, 0), Math_PI / 2.0);
//shape_xform.origin=Vector3(1,1,1);
ps->shape_set_data(capsule_shape, capsule_params);
RID mesh_instance = vs->instance_create2(capsule_mesh, scenario);
character = ps->body_create(PhysicsServer::BODY_MODE_CHARACTER);
ps->body_set_space(character, space);
//todo add space
ps->body_add_shape(character, capsule_shape);
ps->body_set_force_integration_callback(character, this, "body_changed_transform", mesh_instance);
ps->body_set_state(character, PhysicsServer::BODY_STATE_TRANSFORM, Transform(Basis(), Vector3(-2, 5, -2)));
bodies.push_back(character);
}
void test_fall() {
for (int i = 0; i < 35; i++) {
static const PhysicsServer::ShapeType shape_idx[] = {
PhysicsServer::SHAPE_CAPSULE,
PhysicsServer::SHAPE_BOX,
PhysicsServer::SHAPE_SPHERE,
PhysicsServer::SHAPE_CONVEX_POLYGON
};
PhysicsServer::ShapeType type = shape_idx[i % 4];
Transform t;
t.origin = Vector3(0.0 * i, 3.5 + 1.1 * i, 0.7 + 0.0 * i);
t.basis.rotate(Vector3(0.2, -1, 0), Math_PI / 2 * 0.6);
create_body(type, PhysicsServer::BODY_MODE_RIGID, t);
}
create_static_plane(Plane(Vector3(0, 1, 0), -1));
}
void test_activate() {
create_body(PhysicsServer::SHAPE_BOX, PhysicsServer::BODY_MODE_RIGID, Transform(Basis(), Vector3(0, 2, 0)), true);
create_static_plane(Plane(Vector3(0, 1, 0), -1));
}
virtual bool idle(float p_time) {
return false;
}
TestPhysicsMainLoop() {
}
};
namespace TestPhysics {
MainLoop *test() {
return memnew(TestPhysicsMainLoop);
}
} // namespace TestPhysics
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