#include <stdlib.h>
#include <stdbool.h>
+#include "game/camera.h"
+#include "game/level/platforms.h"
#include "system/lt.h"
#include "system/nth_alloc.h"
#include "system/stacktrace.h"
-#include "game/camera.h"
+#include "system/line_stream.h"
+#include "system/str.h"
+#include "system/log.h"
+#include "hashset.h"
#include "./rigid_bodies.h"
-/* TODO(#635): RigidBodies doesn't have enough functionality to replace Rigid_rect */
-
struct RigidBodies
{
Lt *lt;
size_t capacity;
size_t count;
- Vec *positions;
+ Rect *bodies;
Vec *velocities;
Vec *movements;
- Vec *sizes;
- Color *colors;
bool *grounded;
Vec *forces;
+ bool *deleted;
+ HashSet *collided;
+ bool *disabled;
};
RigidBodies *create_rigid_bodies(size_t capacity)
{
Lt *lt = create_lt();
- if (lt == NULL) {
- return NULL;
- }
RigidBodies *rigid_bodies = PUSH_LT(lt, nth_calloc(1, sizeof(RigidBodies)), free);
if (rigid_bodies == NULL) {
rigid_bodies->capacity = capacity;
rigid_bodies->count = 0;
- rigid_bodies->positions = PUSH_LT(lt, nth_calloc(capacity, sizeof(Vec)), free);
- if (rigid_bodies->positions == NULL) {
+ rigid_bodies->bodies = PUSH_LT(lt, nth_calloc(capacity, sizeof(Rect)), free);
+ if (rigid_bodies->bodies == NULL) {
RETURN_LT(lt, NULL);
}
RETURN_LT(lt, NULL);
}
- rigid_bodies->sizes = PUSH_LT(lt, nth_calloc(capacity, sizeof(Vec)), free);
- if (rigid_bodies->sizes == NULL) {
+ rigid_bodies->grounded = PUSH_LT(lt, nth_calloc(capacity, sizeof(bool)), free);
+ if (rigid_bodies->grounded == NULL) {
RETURN_LT(lt, NULL);
}
- rigid_bodies->colors = PUSH_LT(lt, nth_calloc(capacity, sizeof(Color)), free);
- if (rigid_bodies->colors == NULL) {
+ rigid_bodies->forces = PUSH_LT(lt, nth_calloc(capacity, sizeof(Vec)), free);
+ if (rigid_bodies->forces == NULL) {
RETURN_LT(lt, NULL);
}
- rigid_bodies->grounded = PUSH_LT(lt, nth_calloc(capacity, sizeof(bool)), free);
- if (rigid_bodies->grounded == NULL) {
+ rigid_bodies->deleted = PUSH_LT(lt, nth_calloc(capacity, sizeof(bool)), free);
+ if (rigid_bodies->deleted == NULL) {
RETURN_LT(lt, NULL);
}
- rigid_bodies->forces = PUSH_LT(lt, nth_calloc(capacity, sizeof(Vec)), free);
- if (rigid_bodies->forces == NULL) {
+ rigid_bodies->collided = PUSH_LT(
+ lt,
+ create_hashset(sizeof(size_t) * 2, capacity * 2),
+ destroy_hashset);
+ if (rigid_bodies->collided == NULL) {
+ RETURN_LT(lt, NULL);
+ }
+
+ rigid_bodies->disabled = PUSH_LT(
+ lt,
+ nth_calloc(capacity, sizeof(bool)),
+ free);
+ if (rigid_bodies->disabled == NULL) {
RETURN_LT(lt, NULL);
}
RETURN_LT0(rigid_bodies->lt);
}
+static int rigid_bodies_collide_with_itself(RigidBodies *rigid_bodies)
+{
+ trace_assert(rigid_bodies);
+
+ if (rigid_bodies->count == 0) {
+ return 0;
+ }
+
+ size_t pair[2];
+ hashset_clear(rigid_bodies->collided);
+
+ bool the_variable_that_gets_set_when_a_collision_happens_xd = true;
+
+ for (size_t i = 0; i < 1000 && the_variable_that_gets_set_when_a_collision_happens_xd; ++i) {
+ the_variable_that_gets_set_when_a_collision_happens_xd = false;
+ for (size_t i1 = 0; i1 < rigid_bodies->count - 1; ++i1) {
+ if (rigid_bodies->deleted[i1] || rigid_bodies->disabled[i1]) {
+ continue;
+ }
+
+ for (size_t i2 = i1 + 1; i2 < rigid_bodies->count; ++i2) {
+ if (rigid_bodies->deleted[i2] || rigid_bodies->disabled[i1]) {
+ continue;
+ }
+
+ if (!rects_overlap(rigid_bodies->bodies[i1], rigid_bodies->bodies[i2])) {
+ continue;
+ }
+
+ the_variable_that_gets_set_when_a_collision_happens_xd = true;
+
+ pair[0] = i1;
+ pair[1] = i2;
+ hashset_insert(rigid_bodies->collided, pair);
+
+ Vec orient = rect_impulse(&rigid_bodies->bodies[i1], &rigid_bodies->bodies[i2]);
+
+ if (orient.x > orient.y) {
+ if (rigid_bodies->bodies[i1].y < rigid_bodies->bodies[i2].y) {
+ rigid_bodies->grounded[i1] = true;
+ } else {
+ rigid_bodies->grounded[i2] = true;
+ }
+ }
+
+ rigid_bodies->velocities[i1] = vec(rigid_bodies->velocities[i1].x * orient.x, rigid_bodies->velocities[i1].y * orient.y);
+ rigid_bodies->velocities[i2] = vec(rigid_bodies->velocities[i2].x * orient.x, rigid_bodies->velocities[i2].y * orient.y);
+ rigid_bodies->movements[i1] = vec(rigid_bodies->movements[i1].x * orient.x, rigid_bodies->movements[i1].y * orient.y);
+ rigid_bodies->movements[i2] = vec(rigid_bodies->movements[i2].x * orient.x, rigid_bodies->movements[i2].y * orient.y);
+
+ }
+ }
+ }
+
+ size_t *collided = hashset_values(rigid_bodies->collided);
+ const size_t n = hashset_count(rigid_bodies->collided);
+ for (size_t i = 0; i < n; ++i) {
+ const size_t i1 = *(collided + i * 2);
+ const size_t i2 = *(collided + i * 2 + 1);
+
+ rigid_bodies_apply_force(
+ rigid_bodies, i1, vec_sum(rigid_bodies->velocities[i2], rigid_bodies->movements[i2]));
+ rigid_bodies_apply_force(
+ rigid_bodies, i2, vec_sum(rigid_bodies->velocities[i1], rigid_bodies->movements[i1]));
+ }
+
+ return 0;
+}
+
+static int rigid_bodies_collide_with_platforms(
+ RigidBodies *rigid_bodies,
+ const Platforms *platforms)
+{
+ trace_assert(rigid_bodies);
+ trace_assert(platforms);
+
+ int sides[RECT_SIDE_N] = { 0, 0, 0, 0 };
+
+ for (size_t i = 0; i < rigid_bodies->count; ++i) {
+ if (rigid_bodies->deleted[i] || rigid_bodies->disabled[i]) {
+ continue;
+ }
+
+ memset(sides, 0, sizeof(int) * RECT_SIDE_N);
+
+ platforms_touches_rect_sides(platforms, rigid_bodies->bodies[i], sides);
+
+ if (sides[RECT_SIDE_BOTTOM]) {
+ rigid_bodies->grounded[i] = true;
+ }
+
+ Vec v = platforms_snap_rect(platforms, &rigid_bodies->bodies[i]);
+ rigid_bodies->velocities[i] = vec_entry_mult(rigid_bodies->velocities[i], v);
+ rigid_bodies->movements[i] = vec_entry_mult(rigid_bodies->movements[i], v);
+ rigid_bodies_damper(rigid_bodies, i, vec_entry_mult(v, vec(-16.0f, 0.0f)));
+ }
+
+ return 0;
+}
+
+int rigid_bodies_collide(RigidBodies *rigid_bodies,
+ const Platforms *platforms)
+{
+ // TODO(#683): RigidBodies should collide only the bodies that were updated on after a previous collision
+ memset(rigid_bodies->grounded, 0, sizeof(bool) * rigid_bodies->count);
+
+ if (rigid_bodies_collide_with_itself(rigid_bodies) < 0) {
+ return -1;
+ }
+
+ if (rigid_bodies_collide_with_platforms(rigid_bodies, platforms) < 0) {
+ return -1;
+ }
+
+ return 0;
+}
+
int rigid_bodies_update(RigidBodies *rigid_bodies,
+ RigidBodyId id,
float delta_time)
{
trace_assert(rigid_bodies);
- (void) delta_time;
- /* TODO(#639): rigid_bodies_update is not implemented */
+
+ if (rigid_bodies->deleted[id] || rigid_bodies->disabled[id]) {
+ return 0;
+ }
+
+ rigid_bodies->velocities[id] = vec_sum(
+ rigid_bodies->velocities[id],
+ vec_scala_mult(
+ rigid_bodies->forces[id],
+ delta_time));
+
+ Vec position = vec(rigid_bodies->bodies[id].x,
+ rigid_bodies->bodies[id].y);
+
+ position = vec_sum(
+ position,
+ vec_scala_mult(
+ vec_sum(
+ rigid_bodies->velocities[id],
+ rigid_bodies->movements[id]),
+ delta_time));
+
+ rigid_bodies->bodies[id].x = position.x;
+ rigid_bodies->bodies[id].y = position.y;
+
+ rigid_bodies->forces[id] = vec(0.0f, 0.0f);
+
return 0;
}
int rigid_bodies_render(RigidBodies *rigid_bodies,
+ RigidBodyId id,
+ Color color,
Camera *camera)
{
trace_assert(rigid_bodies);
trace_assert(camera);
- for (size_t i = 0; i < rigid_bodies->count; ++i) {
- if (camera_fill_rect(
- camera,
- rect_from_vecs(
- rigid_bodies->positions[i],
- rigid_bodies->sizes[i]),
- rigid_bodies->colors[i]) < 0) {
- return -1;
- }
+ if (rigid_bodies->deleted[id] || rigid_bodies->disabled[id]) {
+ return 0;
+ }
+
+ char text_buffer[256];
+
+ if (camera_fill_rect(
+ camera,
+ rigid_bodies->bodies[id],
+ color) < 0) {
+ return -1;
+ }
+
+ snprintf(text_buffer, 256, "id: %ld", id);
+
+ if (camera_render_debug_text(
+ camera,
+ text_buffer,
+ vec(rigid_bodies->bodies[id].x,
+ rigid_bodies->bodies[id].y)) < 0) {
+ return -1;
+ }
+
+ snprintf(text_buffer, 256, "p:(%.2f, %.2f)",
+ rigid_bodies->bodies[id].x,
+ rigid_bodies->bodies[id].y);
+ if (camera_render_debug_text(
+ camera,
+ text_buffer,
+ vec(rigid_bodies->bodies[id].x,
+ rigid_bodies->bodies[id].y + FONT_CHAR_HEIGHT * 2.0f))) {
+ return -1;
+ }
+
+ snprintf(text_buffer, 256, "v:(%.2f, %.2f)",
+ rigid_bodies->velocities[id].x,
+ rigid_bodies->velocities[id].y);
+ if (camera_render_debug_text(
+ camera,
+ text_buffer,
+ vec(rigid_bodies->bodies[id].x,
+ rigid_bodies->bodies[id].y + FONT_CHAR_HEIGHT * 4.0f))) {
+ return -1;
+ }
+
+ snprintf(text_buffer, 256, "m:(%.2f, %.2f)",
+ rigid_bodies->movements[id].x,
+ rigid_bodies->movements[id].y);
+ if (camera_render_debug_text(
+ camera,
+ text_buffer,
+ vec(rigid_bodies->bodies[id].x,
+ rigid_bodies->bodies[id].y + FONT_CHAR_HEIGHT * 6.0f))) {
+ return -1;
}
return 0;
}
RigidBodyId rigid_bodies_add(RigidBodies *rigid_bodies,
- Rect rect,
- Color color)
+ Rect rect)
{
trace_assert(rigid_bodies);
trace_assert(rigid_bodies->count < rigid_bodies->capacity);
RigidBodyId id = rigid_bodies->count++;
- rigid_bodies->positions[id] = vec(rect.x, rect.y);
- rigid_bodies->sizes[id] = vec(rect.w, rect.h);
- rigid_bodies->colors[id] = color;
+ rigid_bodies->bodies[id] = rect;
return id;
}
+void rigid_bodies_remove(RigidBodies *rigid_bodies,
+ RigidBodyId id)
+{
+ trace_assert(rigid_bodies);
+ trace_assert(id < rigid_bodies->capacity);
+
+ rigid_bodies->deleted[id] = true;
+}
+
+Rect rigid_bodies_hitbox(const RigidBodies *rigid_bodies,
+ RigidBodyId id)
+{
+ trace_assert(rigid_bodies);
+ trace_assert(id < rigid_bodies->count);
+
+ return rigid_bodies->bodies[id];
+}
+
+void rigid_bodies_move(RigidBodies *rigid_bodies,
+ RigidBodyId id,
+ Vec movement)
+{
+ trace_assert(rigid_bodies);
+ trace_assert(id < rigid_bodies->count);
+
+ if (rigid_bodies->deleted[id] || rigid_bodies->disabled[id]) {
+ return;
+ }
+
+ rigid_bodies->movements[id] = movement;
+}
+
+int rigid_bodies_touches_ground(const RigidBodies *rigid_bodies,
+ RigidBodyId id)
+{
+ trace_assert(rigid_bodies);
+ trace_assert(id < rigid_bodies->count);
+
+ return rigid_bodies->grounded[id];
+}
+
+void rigid_bodies_apply_omniforce(RigidBodies *rigid_bodies,
+ Vec force)
+{
+ for (size_t i = 0; i < rigid_bodies->count; ++i) {
+ rigid_bodies_apply_force(rigid_bodies, i, force);
+ }
+}
+
+void rigid_bodies_apply_force(RigidBodies * rigid_bodies,
+ RigidBodyId id,
+ Vec force)
+{
+ trace_assert(rigid_bodies);
+ trace_assert(id < rigid_bodies->count);
+
+ if (rigid_bodies->deleted[id] || rigid_bodies->disabled[id]) {
+ return;
+ }
+
+ rigid_bodies->forces[id] = vec_sum(rigid_bodies->forces[id], force);
+}
+
+void rigid_bodies_transform_velocity(RigidBodies *rigid_bodies,
+ RigidBodyId id,
+ mat3x3 trans_mat)
+{
+ trace_assert(rigid_bodies);
+ trace_assert(id < rigid_bodies->count);
+
+ if (rigid_bodies->deleted[id] || rigid_bodies->disabled[id]) {
+ return;
+ }
+
+ rigid_bodies->velocities[id] = point_mat3x3_product(
+ rigid_bodies->velocities[id],
+ trans_mat);
+}
+
+void rigid_bodies_teleport_to(RigidBodies *rigid_bodies,
+ RigidBodyId id,
+ Vec position)
+{
+ trace_assert(rigid_bodies);
+ trace_assert(id < rigid_bodies->count);
+
+ if (rigid_bodies->deleted[id] || rigid_bodies->disabled[id]) {
+ return;
+ }
+
+ rigid_bodies->bodies[id].x = position.x;
+ rigid_bodies->bodies[id].y = position.y;
+}
+
+void rigid_bodies_damper(RigidBodies *rigid_bodies,
+ RigidBodyId id,
+ Vec v)
+{
+ trace_assert(rigid_bodies);
+ trace_assert(id < rigid_bodies->count);
+
+ if (rigid_bodies->deleted[id] || rigid_bodies->disabled[id]) {
+ return;
+ }
+
+ rigid_bodies_apply_force(
+ rigid_bodies, id,
+ vec(
+ rigid_bodies->velocities[id].x * v.x,
+ rigid_bodies->velocities[id].y * v.y));
+}
+
void rigid_bodies_disable(RigidBodies *rigid_bodies,
- RigidBodyId id)
+ RigidBodyId id,
+ bool disabled)
{
trace_assert(rigid_bodies);
- (void) id;
+ trace_assert(id < rigid_bodies->count);
- /* TODO: rigid_bodies_disable is not implemented */
+ rigid_bodies->disabled[id] = disabled;
}
projects / nothing.git / blobdiff