X-Git-Url: https://git.lizzy.rs/?a=blobdiff_plain;f=src%2Fgame%2Flevel%2Frigid_bodies.c;h=667916e87fc7b5cf9e31688f1454b001e0fe6555;hb=41e24206d6b0211307641bef85a252890bfc7339;hp=eca05c941113bb3541706a47962aaa7f907c983b;hpb=b4709ce8865b7ee69e7be3b4121c50cf9f7bab60;p=nothing.git

diff --git a/src/game/level/rigid_bodies.c b/src/game/level/rigid_bodies.c
index eca05c94..667916e8 100644
--- a/src/game/level/rigid_bodies.c
+++ b/src/game/level/rigid_bodies.c
@@ -1,163 +1,404 @@
 #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 "algo/dynarray.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
 {
-    Vec *positions;
-    Vec *velocities;
-    Vec *movements;
-    Vec *sizes;
-    Color *colors;
-    int *ground_touches;
-    Vec *forces;
+    Lt *lt;
+    size_t capacity;
+    size_t count;
+
+    Rect *bodies;
+    Vec2f *velocities;
+    Vec2f *movements;
+    bool *grounded;
+    Vec2f *forces;
+    bool *deleted;
+    bool *disabled;
 };
 
-RigidBodies *create_rigid_bodies(void)
+RigidBodies *create_rigid_bodies(size_t capacity)
 {
-    RigidBodies *rigid_bodies = nth_calloc(1, sizeof(RigidBodies));
+    Lt *lt = create_lt();
+
+    RigidBodies *rigid_bodies = PUSH_LT(lt, nth_calloc(1, sizeof(RigidBodies)), free);
     if (rigid_bodies == NULL) {
-        goto fail;
+        RETURN_LT(lt, NULL);
     }
+    rigid_bodies->lt = lt;
+
+    rigid_bodies->capacity = capacity;
+    rigid_bodies->count = 0;
 
-    rigid_bodies->positions = create_dynarray(sizeof(Vec));
-    if (rigid_bodies->positions == NULL) {
-        goto fail;
+    rigid_bodies->bodies = PUSH_LT(lt, nth_calloc(capacity, sizeof(Rect)), free);
+    if (rigid_bodies->bodies == NULL) {
+        RETURN_LT(lt, NULL);
     }
 
-    rigid_bodies->velocities = create_dynarray(sizeof(Vec));
+    rigid_bodies->velocities = PUSH_LT(lt, nth_calloc(capacity, sizeof(Vec2f)), free);
     if (rigid_bodies->velocities == NULL) {
-        goto fail;
+        RETURN_LT(lt, NULL);
     }
 
-    rigid_bodies->movements = create_dynarray(sizeof(Vec));
+    rigid_bodies->movements = PUSH_LT(lt, nth_calloc(capacity, sizeof(Vec2f)), free);
     if (rigid_bodies->movements == NULL) {
-        goto fail;
+        RETURN_LT(lt, NULL);
     }
 
-    rigid_bodies->sizes = create_dynarray(sizeof(Vec));
-    if (rigid_bodies->sizes == NULL) {
-        goto fail;
+    rigid_bodies->grounded = PUSH_LT(lt, nth_calloc(capacity, sizeof(bool)), free);
+    if (rigid_bodies->grounded == NULL) {
+        RETURN_LT(lt, NULL);
     }
 
-    rigid_bodies->colors = create_dynarray(sizeof(Color));
-    if (rigid_bodies->colors == NULL) {
-        goto fail;
+    rigid_bodies->forces = PUSH_LT(lt, nth_calloc(capacity, sizeof(Vec2f)), free);
+    if (rigid_bodies->forces == NULL) {
+        RETURN_LT(lt, NULL);
     }
 
-    rigid_bodies->ground_touches = create_dynarray(sizeof(int));
-    if (rigid_bodies->ground_touches == NULL) {
-        goto fail;
+    rigid_bodies->deleted = PUSH_LT(lt, nth_calloc(capacity, sizeof(bool)), free);
+    if (rigid_bodies->deleted == NULL) {
+        RETURN_LT(lt, NULL);
     }
 
-    rigid_bodies->forces = create_dynarray(sizeof(Vec));
-    if (rigid_bodies->forces == NULL) {
-        goto fail;
+    rigid_bodies->disabled = PUSH_LT(
+        lt,
+        nth_calloc(capacity, sizeof(bool)),
+        free);
+    if (rigid_bodies->disabled == NULL) {
+        RETURN_LT(lt, NULL);
     }
 
     return rigid_bodies;
-
-fail:
-    destroy_rigid_bodies(rigid_bodies);
-    return NULL;
 }
 
 void destroy_rigid_bodies(RigidBodies *rigid_bodies)
 {
-    if (rigid_bodies == NULL) {
-        return;
-    }
+    trace_assert(rigid_bodies);
+    RETURN_LT0(rigid_bodies->lt);
+}
 
-    if (rigid_bodies->positions != NULL) {
-        destroy_dynarray(rigid_bodies->positions);
-    }
+int rigid_bodies_collide(RigidBodies *rigid_bodies,
+                         const Platforms *platforms)
+{
+    memset(rigid_bodies->grounded, 0, sizeof(bool) * rigid_bodies->count);
 
-    if (rigid_bodies->velocities != NULL) {
-        destroy_dynarray(rigid_bodies->velocities);
+    if (rigid_bodies->count == 0) {
+        return 0;
     }
 
-    if (rigid_bodies->movements != NULL) {
-        destroy_dynarray(rigid_bodies->movements);
-    }
+    int sides[RECT_SIDE_N] = { 0, 0, 0, 0 };
 
-    if (rigid_bodies->sizes != NULL) {
-        destroy_dynarray(rigid_bodies->sizes);
-    }
 
-    if (rigid_bodies->colors != NULL) {
-        destroy_dynarray(rigid_bodies->colors);
-    }
+    int t = 100;
+    int the_variable_that_gets_set_when_a_collision_happens_xd = 1;
+    while (t-- > 0 && the_variable_that_gets_set_when_a_collision_happens_xd) {
+        the_variable_that_gets_set_when_a_collision_happens_xd = 0;
 
-    if (rigid_bodies->ground_touches != NULL) {
-        destroy_dynarray(rigid_bodies->ground_touches);
-    }
+        for (size_t i1 = 0; i1 < rigid_bodies->count; ++i1) {
+            if (rigid_bodies->deleted[i1] || rigid_bodies->disabled[i1]) {
+                continue;
+            }
+
+            // Platforms
+            memset(sides, 0, sizeof(int) * RECT_SIDE_N);
+
+            platforms_touches_rect_sides(platforms, rigid_bodies->bodies[i1], sides);
+
+            for (int i = 0; i < RECT_SIDE_N; ++i) {
+                if (sides[i]) {
+                    the_variable_that_gets_set_when_a_collision_happens_xd = 1;
+                }
+            }
+
+            if (sides[RECT_SIDE_BOTTOM]) {
+                rigid_bodies->grounded[i1] = true;
+            }
+
+            Vec2f v = platforms_snap_rect(platforms, &rigid_bodies->bodies[i1]);
+            rigid_bodies->velocities[i1] = vec_entry_mult(rigid_bodies->velocities[i1], v);
+            rigid_bodies->movements[i1] = vec_entry_mult(rigid_bodies->movements[i1], v);
+            rigid_bodies_damper(rigid_bodies, i1, vec_entry_mult(v, vec(-16.0f, 0.0f)));
+
+            if (i1 >= rigid_bodies->count - 1) {
+                continue;
+            }
+
+            // Self-collision
+            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 = 1;
 
-    if (rigid_bodies->forces != NULL) {
-        destroy_dynarray(rigid_bodies->forces);
+                Vec2f 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);
+            }
+        }
     }
 
-    free(rigid_bodies);
+    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));
+
+    Vec2f 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,
-                        Camera *camera)
+                        RigidBodyId id,
+                        Color color,
+                        const Camera *camera)
 {
     trace_assert(rigid_bodies);
     trace_assert(camera);
 
-    const size_t n = dynarray_count(rigid_bodies->positions);
-    for (size_t i = 0; i < n; ++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: %zd", 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;
 }
 
-int rigid_bodies_add(RigidBodies *rigid_bodies,
-                     Rect rect,
-                     Color color,
-                     unsigned int *id)
+RigidBodyId rigid_bodies_add(RigidBodies *rigid_bodies,
+                             Rect rect)
 {
     trace_assert(rigid_bodies);
-    trace_assert(id);
-    (void) rect;
-    (void) color;
-    (void) id;
+    trace_assert(rigid_bodies->count < rigid_bodies->capacity);
 
-    /* TODO(#640): rigid_bodies_add is not implemented */
+    RigidBodyId id = rigid_bodies->count++;
+    rigid_bodies->bodies[id] = rect;
 
-    return 0;
+    return id;
 }
 
-int rigid_bodies_remove(RigidBodies *rigid_bodies,
-                        unsigned int id)
+void rigid_bodies_remove(RigidBodies *rigid_bodies,
+                         RigidBodyId id)
 {
     trace_assert(rigid_bodies);
-    (void) id;
-    /* TODO(#641): rigid_bodies_remove is not implemented */
-    return 0;
+    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,
+                       Vec2f 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,
+                                  Vec2f 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,
+                              Vec2f 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,
+                              Vec2f 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,
+                         Vec2f 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,
+                          bool disabled)
+{
+    trace_assert(rigid_bodies);
+    trace_assert(id < rigid_bodies->count);
+
+    rigid_bodies->disabled[id] = disabled;
 }