static image* perlin_noise_generate(int x_size, int y_size, int octaves) {
unsigned char* data = malloc(sizeof(char) * x_size * y_size);
int i, x, y;
/* Clear data to average */
for(x = 0; x < x_size; x++)
for(y = 0; y < y_size; y++) {
data[x + (y * x_size)] = 128;
}
srand(time(NULL));
debug("Generating perlin noise.");
for(i = 0; i < octaves; i++ ) {
float wavelength = pow( 2, i);
float amplitude = pow( 0.5, octaves-i );
vec2 seed = vec2_new(rand(),rand());
debug("Octave: %i Wavelength: %f Amplitude: %f", i, wavelength, amplitude);
for(x = 0; x < x_size; x++)
for(y = 0; y < y_size; y++) {
/* Four positions are required for tiling behaviour */
vec2 pos, pos_x, pos_y, pos_xy;
pos = vec2_div( vec2_new(x, y) , wavelength );
pos_x = vec2_div( vec2_new(x - x_size, y) , wavelength );
pos_y = vec2_div( vec2_new(x, y - y_size) , wavelength );
pos_xy = vec2_div( vec2_new(x - x_size, y - y_size) , wavelength );
pos = vec2_add( pos, seed );
pos_x = vec2_add( pos_x, seed );
pos_y = vec2_add( pos_y, seed );
pos_xy = vec2_add( pos_xy, seed );
float val = perlin_noise2D(pos) * amplitude;
float val_x = perlin_noise2D(pos_x) * amplitude;
float val_y = perlin_noise2D(pos_y) * amplitude;
float val_xy = perlin_noise2D(pos_xy) * amplitude;
val = bilinear_interp(val_x, val, val_xy, val_y, (float)x/x_size, (float)y/y_size);
data[x + (y * x_size)] += val * 128;
}
}
unsigned char* image_data = malloc(sizeof(char) * 4 * x_size * y_size);
for(x = 0; x < x_size; x++)
for(y = 0; y < y_size; y++) {
int amount = data[x + y * x_size];
image_data[x * 4 + y * x_size * 4 + 0] = amount;
image_data[x * 4 + y * x_size * 4 + 1] = amount;
image_data[x * 4 + y * x_size * 4 + 2] = amount;
image_data[x * 4 + y * x_size * 4 + 3] = 255;
}
free(data);
return image_new(x_size, y_size, image_data);
}
void OBSBasicPreview::StretchItem(const vec2 &pos)
{
Qt::KeyboardModifiers modifiers = QGuiApplication::keyboardModifiers();
obs_bounds_type boundsType = obs_sceneitem_get_bounds_type(stretchItem);
uint32_t stretchFlags = (uint32_t)stretchHandle;
bool shiftDown = (modifiers & Qt::ShiftModifier);
vec3 tl, br, pos3;
vec3_zero(&tl);
vec3_set(&br, stretchItemSize.x, stretchItemSize.y, 0.0f);
vec3_set(&pos3, pos.x, pos.y, 0.0f);
vec3_transform(&pos3, &pos3, &screenToItem);
if (stretchFlags & ITEM_LEFT)
tl.x = pos3.x;
else if (stretchFlags & ITEM_RIGHT)
br.x = pos3.x;
if (stretchFlags & ITEM_TOP)
tl.y = pos3.y;
else if (stretchFlags & ITEM_BOTTOM)
br.y = pos3.y;
if (!(modifiers & Qt::ControlModifier))
SnapStretchingToScreen(tl, br);
obs_source_t source = obs_sceneitem_getsource(stretchItem);
vec2 baseSize;
vec2_set(&baseSize,
float(obs_source_getwidth(source)),
float(obs_source_getheight(source)));
vec2 size;
vec2_set(&size,br. x - tl.x, br.y - tl.y);
if (boundsType != OBS_BOUNDS_NONE) {
if (shiftDown)
ClampAspect(tl, br, size, baseSize);
if (tl.x > br.x) std::swap(tl.x, br.x);
if (tl.y > br.y) std::swap(tl.y, br.y);
vec2_abs(&size, &size);
obs_sceneitem_set_bounds(stretchItem, &size);
} else {
if (!shiftDown)
ClampAspect(tl, br, size, baseSize);
vec2_div(&size, &size, &baseSize);
obs_sceneitem_setscale(stretchItem, &size);
}
pos3 = CalculateStretchPos(tl, br);
vec3_transform(&pos3, &pos3, &itemToScreen);
vec2 newPos;
vec2_set(&newPos, std::round(pos3.x), std::round(pos3.y));
obs_sceneitem_setpos(stretchItem, &newPos);
}
u64 load_pixel_frame(u64 texture, int x, int y, int x2, int y2){
texture_info texinfo;
if(!try_get_texture_info(texture, &texinfo)){
char namebuf[100];
get_textures(texture, namebuf, sizeof(namebuf));
stbi_info(namebuf, &texinfo.width, &texinfo.height, &texinfo.comp);
set_texture_info(texture, texinfo);
}
vec2 size = vec2_new(texinfo.width, texinfo.height);
texture_section sec =
{.uv_offset = vec2_div(vec2_new(x, y), size),
.uv_size = vec2_div(vec2_new(x2 - x, y2 - y), size),
.render_offset = vec2_new(0,0),
.pixel_size = vec2_new(x2 - x, y2 - y)};
//sec.uv_offset.y = 1.0 - sec.uv_offset.y;
add_texture_sections(texture, sec);
return 0;
}
u64 load_pixel_frame_center_of_mass(u64 texture, int x, int y, int x2, int y2, int cx, int cy){
texture_info texinfo;
if(!try_get_texture_info(texture, &texinfo)){
char namebuf[100];
get_textures(texture, namebuf, sizeof(namebuf));
stbi_info(namebuf, &texinfo.width, &texinfo.height, &texinfo.comp);
set_texture_info(texture, texinfo);
}
vec2 size = vec2_new(texinfo.width, texinfo.height);
int center_x = (x2 + x) / 2, center_y = (y2 + y) / 2;
texture_section sec =
{.uv_offset = vec2_div(vec2_new(x, y), size),
.uv_size = vec2_div(vec2_new(x2 - x, y2 - y), size),
.render_offset = vec2_new(center_x - cx, center_y - cy),
.pixel_size = vec2_new(x2 - x, y2 - y)};
add_texture_sections(texture, sec);
return 0;
}
CREATE_TABLE2(animation, u64, animation_state);
struct{
u32 count;
i32 * texture;
u64 * texid;
}loaded_textures;
i32 get_animation_gltexture(u64 tex){
u64 * id = memmem(loaded_textures.texid, loaded_textures.count * sizeof(u64), &tex, sizeof(u64));
if(id != NULL){
ASSERT(*id == tex);
return loaded_textures.texture[id - loaded_textures.texid];
}
char buffer[100];
get_textures(tex, buffer, sizeof(buffer));
i32 newtex = load_gl_texture(buffer);
list_push(loaded_textures.texture, loaded_textures.count, newtex);
list_push2(loaded_textures.texid, loaded_textures.count, tex);
return newtex;
}
vec2 ui_rectangle_center(ui_rectangle* r) {
return vec2_div(vec2_add(r->top_left, r->bottom_right), 2);
}
void tick_game(struct GameMemory *memory, struct Input *input, uint32 screen_width, uint32 screen_height, float dt)
{
struct GameState *game_state = (struct GameState *)memory->game_memory;
struct RenderBuffer *render_buffer = (struct RenderBuffer *)memory->render_memory;
clear_render_buffer(render_buffer);
for (uint32 i = 0; i < game_state->visibility_graph.vertex_count; ++i)
{
vec2 vertex = game_state->visibility_graph.vertices[i];
draw_world_quad_buffered(render_buffer, vertex, vec2_scalar(0.1f), vec4_zero(), vec3_new(0, 1, 1));
}
for (uint32 i = 0; i < game_state->visibility_graph.edge_count; ++i)
{
uint32 *edge = &game_state->visibility_graph.edges[i][0];
vec2 p0 = game_state->visibility_graph.vertices[edge[0]];
vec2 p1 = game_state->visibility_graph.vertices[edge[1]];
draw_world_line_buffered(render_buffer, p0, p1, vec3_new(1, 1, 0));
}
if (mouse_down(MOUSE_LEFT, input))
{
struct AABB box = calc_mouse_selection_box(input, MOUSE_LEFT);
vec2 size = vec2_sub(box.max, box.min);
vec2 bottom_left = vec2_new(box.min.x, box.max.y);
vec2 bottom_right = vec2_new(box.max.x, box.max.y);
vec2 top_left = vec2_new(box.min.x, box.min.y);
vec2 top_right = vec2_new(box.max.x, box.min.y);
const uint32 outline_thickness = 1;
draw_screen_quad_buffered(render_buffer, top_left, vec2_new(size.x, outline_thickness), vec4_zero(), vec3_new(1, 1, 0));
draw_screen_quad_buffered(render_buffer, bottom_left, vec2_new(size.x, outline_thickness), vec4_zero(), vec3_new(1, 1, 0));
draw_screen_quad_buffered(render_buffer, top_left, vec2_new(outline_thickness, size.y), vec4_zero(), vec3_new(1, 1, 0));
draw_screen_quad_buffered(render_buffer, top_right, vec2_new(outline_thickness, size.y), vec4_zero(), vec3_new(1, 1, 0));
}
if (mouse_released(MOUSE_LEFT, input))
{
// Clear previous selection.
game_state->selected_ship_count = 0;
struct AABB screen_selection_box = calc_mouse_selection_box(input, MOUSE_LEFT);
// Because screen space y-values are inverted, these two results have conflicting
// y-values, i.e. screen_to_world_min.y is actually the maximum y. These values
// are then properly min/maxed and stored correctly in world_selection_box.
vec2 screen_to_world_min = screen_to_world_coords(screen_selection_box.min, &game_state->camera, screen_width, screen_height);
vec2 screen_to_world_max = screen_to_world_coords(screen_selection_box.max, &game_state->camera, screen_width, screen_height);
struct AABB world_selection_box;
world_selection_box.min = min_vec2(screen_to_world_min, screen_to_world_max);
world_selection_box.max = max_vec2(screen_to_world_min, screen_to_world_max);
// Add colliding ships to the selection list.
// TODO: optimize, spatial grid hash?
for (uint32 i = 0; i < game_state->ship_count; ++i)
{
struct Ship *ship = &game_state->ships[i];
struct AABB ship_aabb = aabb_from_transform(ship->position, ship->size);
vec2 center = vec2_div(vec2_add(ship_aabb.min, ship_aabb.max), 2.0f);
if (aabb_aabb_intersection(world_selection_box, ship_aabb))
game_state->selected_ships[game_state->selected_ship_count++] = ship->id;
}
if (game_state->selected_ship_count > 0)
fprintf(stderr, "selected %u ships\n", game_state->selected_ship_count);
}
if (mouse_down(MOUSE_RIGHT, input))
{
vec2 target_position = screen_to_world_coords(input->mouse_position, &game_state->camera, screen_width, screen_height);
for (uint32 i = 0; i < game_state->selected_ship_count; ++i)
{
uint32 id = game_state->selected_ships[i];
struct Ship *ship = get_ship_by_id(game_state, id);
ship->target_position = target_position;
ship->move_order = true;
}
}
// Outline selected ships.
for (uint32 i = 0; i < game_state->selected_ship_count; ++i)
{
uint32 id = game_state->selected_ships[i];
struct Ship *ship = get_ship_by_id(game_state, id);
draw_world_quad_buffered(render_buffer, ship->position, vec2_mul(ship->size, 1.1f), vec4_zero(), vec3_new(0, 1, 0));
if (ship->move_order)
draw_world_quad_buffered(render_buffer, ship->target_position, vec2_new(0.5f, 0.5f), vec4_zero(), vec3_new(0, 1, 0));
}
// Handle move orders.
for (uint32 i = 0; i < game_state->ship_count; ++i)
{
struct Ship *ship = &game_state->ships[i];
if (ship->move_order)
{
vec2 direction = vec2_zero();
/*
if (vec2_length2(direction) < FLOAT_EPSILON)
direction = vec2_normalize(vec2_sub(ship->target_position, ship->position));
*/
ship->move_velocity = vec2_mul(direction, 2.0f);
/*
vec2 direction = vec2_normalize(vec2_sub(ship->target_position, ship->position));
ship->move_velocity = vec2_mul(direction, 2.0f);
*/
if (vec2_distance2(ship->position, ship->target_position) < 0.1f)
{
ship->move_velocity = vec2_zero();
ship->move_order = false;
}
}
}
tick_camera(input, &game_state->camera, dt);
tick_combat(game_state, dt);
tick_physics(game_state, dt);
}
static void tick_physics(struct GameState *game_state, float dt)
{
// Projectile kinematics.
for (uint32 i = 0; i < game_state->projectile_count; ++i)
{
struct Projectile *projectile = &game_state->projectiles[i];
// r = r0 + (v*t) + (a*t^2)/2
projectile->position = vec2_add(projectile->position, vec2_mul(projectile->velocity, dt));
}
// Ship kinematics.
for (uint32 i = 0; i < game_state->ship_count; ++i)
{
struct Ship *ship = &game_state->ships[i];
vec2 move_acceleration = vec2_zero();
// v = v0 + (a*t)
ship->move_velocity = vec2_add(ship->move_velocity, vec2_mul(move_acceleration, dt));
// r = r0 + (v*t) + (a*t^2)/2
ship->position = vec2_add(vec2_add(ship->position, vec2_mul(ship->move_velocity, dt)), vec2_div(vec2_mul(move_acceleration, dt * dt), 2.0f));
}
//
// TODO: spatial hashing
//
// Projectile collision.
for (uint32 i = 0; i < game_state->projectile_count; ++i)
{
struct Projectile *projectile = &game_state->projectiles[i];
struct AABB projectile_aabb = aabb_from_transform(projectile->position, projectile->size);
// Projectile-building collision.
for (uint32 j = 0; j < game_state->building_count; ++j)
{
struct Building *building = &game_state->buildings[j];
struct AABB building_aabb = aabb_from_transform(building->position, building->size);
if (aabb_aabb_intersection(projectile_aabb, building_aabb))
{
// TODO: damage building if not friendly
destroy_projectile(game_state, projectile);
break;
}
}
// NOTE: owner may be dead and destroyed at this point, so checking for NULL might be required.
struct Ship *owner = get_ship_by_id(game_state, projectile->owner);
// Projectile-ship collision.
for (uint32 j = 0; j < game_state->ship_count; ++j)
{
struct Ship *ship = &game_state->ships[j];
if (ship->id == projectile->owner)
continue;
#if 0
// Allow projectiles to pass through teammates.
if (ship->team == projectile->team)
continue;
#endif
struct AABB ship_aabb = aabb_from_transform(ship->position, ship->size);
if (aabb_aabb_intersection(projectile_aabb, ship_aabb))
{
// Disable friendly fire.
if (ship->team != projectile->team)
damage_ship(game_state, ship, projectile->damage);
destroy_projectile(game_state, projectile);
break;
}
}
}
// TODO: optimize
// Ship collision.
if (game_state->ship_count >= 2)
{
for (uint32 i = 0; i < game_state->ship_count - 1; ++i)
{
struct Ship *a = &game_state->ships[i];
struct AABB a_aabb = aabb_from_transform(a->position, a->size);
vec2 a_center = vec2_div(vec2_add(a_aabb.min, a_aabb.max), 2.0f);
vec2 a_half_extents = vec2_div(vec2_sub(a_aabb.max, a_aabb.min), 2.0f);
// Ship-building collision.
for (uint32 j = 0; j < game_state->building_count; ++j)
{
struct Building *building = &game_state->buildings[j];
struct AABB b_aabb = aabb_from_transform(building->position, building->size);
if (aabb_aabb_intersection(a_aabb, b_aabb))
{
vec2 b_center = vec2_div(vec2_add(b_aabb.min, b_aabb.max), 2.0f);
vec2 b_half_extents = vec2_div(vec2_sub(b_aabb.max, b_aabb.min), 2.0f);
vec2 intersection = vec2_sub(vec2_abs(vec2_sub(b_center, a_center)), vec2_add(a_half_extents, b_half_extents));
if (intersection.x > intersection.y)
{
a->move_velocity.x = 0.0f;
if (a->position.x < building->position.x)
a->position.x += intersection.x/2.0f;
else
a->position.x -= intersection.x/2.0f;
}
else
{
a->move_velocity.y = 0.0f;
if (a->position.y < building->position.y)
a->position.y += intersection.y/2.0f;
else
a->position.y -= intersection.y/2.0f;
}
}
}
// Ship-ship collision.
for (uint32 j = i + 1; j < game_state->ship_count; ++j)
{
struct Ship *b = &game_state->ships[j];
struct AABB b_aabb = aabb_from_transform(b->position, b->size);
if (aabb_aabb_intersection(a_aabb, b_aabb))
{
vec2 b_center = vec2_div(vec2_add(b_aabb.min, b_aabb.max), 2.0f);
vec2 b_half_extents = vec2_div(vec2_sub(b_aabb.max, b_aabb.min), 2.0f);
vec2 intersection = vec2_sub(vec2_abs(vec2_sub(b_center, a_center)), vec2_add(a_half_extents, b_half_extents));
if (intersection.x > intersection.y)
{
if (abs_float(a->move_velocity.x) > abs_float(b->move_velocity.x))
a->move_velocity.x = 0.0f;
else
b->move_velocity.x = 0.0f;
if (a->position.x < b->position.x)
{
a->position.x += intersection.x/2.0f;
b->position.x -= intersection.x/2.0f;
}
else
{
a->position.x -= intersection.x/2.0f;
b->position.x += intersection.x/2.0f;
}
}
else
{
if (abs_float(a->move_velocity.y) > abs_float(b->move_velocity.y))
a->move_velocity.y = 0.0f;
else
b->move_velocity.y = 0.0f;
if (a->position.y < b->position.y)
{
a->position.y += intersection.y/2.0f;
b->position.y -= intersection.y/2.0f;
}
else
{
a->position.y -= intersection.y/2.0f;
b->position.y += intersection.y/2.0f;
}
}
}
}
}
}
}
static void tick_camera(struct Input *input, struct Camera *camera, float dt)
{
//
// move
//
vec2 camera_up = vec2_direction(camera->rotation);
vec2 camera_right = vec2_direction(camera->rotation - PI_OVER_TWO);
vec2 move_acceleration = vec2_zero();
if (key_down(GLFW_KEY_W, input))
move_acceleration = vec2_add(move_acceleration, camera_up);
if (key_down(GLFW_KEY_A, input))
move_acceleration = vec2_add(move_acceleration, vec2_negate(camera_right));
if (key_down(GLFW_KEY_S, input))
move_acceleration = vec2_add(move_acceleration, vec2_negate(camera_up));
if (key_down(GLFW_KEY_D, input))
move_acceleration = vec2_add(move_acceleration, camera_right);
if (vec2_length2(move_acceleration) > FLOAT_EPSILON)
{
const float acceleration_magnitude = camera->zoom * 10.0f;
move_acceleration = vec2_normalize(move_acceleration);
move_acceleration = vec2_mul(move_acceleration, acceleration_magnitude);
// v = v0 + (a*t)
camera->move_velocity = vec2_add(camera->move_velocity, vec2_mul(move_acceleration, dt));
// Clamp move velocity.
const float max_move_speed = 5.0f * sqrtf(camera->zoom);
if (vec2_length2(camera->move_velocity) > (max_move_speed * max_move_speed))
camera->move_velocity = vec2_mul(vec2_normalize(camera->move_velocity), max_move_speed);
}
// Number of seconds required for friction to stop movement completely.
// (because velocity is sampled each frame, actual stop time longer than this)
float stop_time = 0.1f;
float inv_stop_time = 1.0f / stop_time;
if (move_acceleration.x == 0.0f)
camera->move_velocity.x -= camera->move_velocity.x * inv_stop_time * dt;
if (move_acceleration.y == 0.0f)
camera->move_velocity.y -= camera->move_velocity.y * inv_stop_time * dt;
// r = r0 + (v0*t) + (a*t^2)/2
camera->position = vec2_add(vec2_add(camera->position, vec2_mul(camera->move_velocity, dt)), vec2_div(vec2_mul(move_acceleration, dt * dt), 2.0f));
//
// zoom
//
float zoom_acceleration = 0.0f;
if (key_down(GLFW_KEY_SPACE, input))
zoom_acceleration += 1.0f;
if (key_down(GLFW_KEY_LEFT_CONTROL, input))
zoom_acceleration -= 1.0f;
zoom_acceleration *= camera->zoom * 50.0f;
if (zoom_acceleration == 0.0f)
camera->zoom_velocity -= camera->zoom_velocity * (1.0f / 0.1f) * dt;
// v = v0 + (a*t)
camera->zoom_velocity += zoom_acceleration * dt;
// r = r0 + (v0*t) + (a*t^2)/2
camera->zoom += (camera->zoom_velocity * dt) + (zoom_acceleration * dt * dt) / 2.0f;
// Clamp zoom velocity.
const float max_zoom_speed = 3.0f * camera->zoom;
camera->zoom_velocity = clamp_float(camera->zoom_velocity, -max_zoom_speed, max_zoom_speed);
float unclamped_zoom = camera->zoom;
camera->zoom = clamp_float(camera->zoom, 1.0f, 1000.0f);
if (camera->zoom != unclamped_zoom)
camera->zoom_velocity = 0.0f;
}
