static int
jarhead_hit(struct foe_jarhead *f, const vector2 *hit)
{
const float radius = foe_data[f->common.type].radius;
if (vec2_distance_squared(hit, &f->common.pos) < radius*radius) {
if (f->state == JARHEAD_ALIVE) {
if (irand(3) == 0) {
foe_common_gen_explosion(&f->common, 1.f);
kill_foe(&f->common);
} else {
vector2 s = ship.pos;
f->state = JARHEAD_EXPLODING;
vec2_mul_scalar(&s, .1f);
vec2_sub_from(&f->common.dir, &s);
f->hit_dir = f->common.dir;
vec2_mul_scalar(&f->hit_dir,
.02f/vec2_length(&f->hit_dir));
f->common.angle_speed *= -4.f;
f->ttl = JARHEAD_TTL_AFTER_HIT;
f->spin_angle = .2f + .2f*frand();
if (irand(2))
f->spin_angle = -f->spin_angle;
}
foe_common_bump_score(&f->common);
}
return 1;
}
return 0;
}
static int
ninja_hit(struct foe_ninja *f, const vector2 *hit)
{
int r = 0;
const float radius = foe_data[FOE_NINJA].radius;
if (vec2_distance_squared(hit, &f->common.pos) < radius*radius) {
r = 1;
if (--f->hit_count <= 0) {
foe_common_gen_explosion(&f->common, 1.f);
kill_foe(&f->common);
foe_common_bump_score(&f->common);
} else {
vector2 s = ship.pos;
f->state = NINJA_RECOVERING;
vec2_mul_scalar(&s, .15f);
vec2_sub_from(&f->common.dir, &s);
f->hit_dir = f->common.dir;
vec2_mul_scalar(&f->hit_dir,
.03f/vec2_length(&f->hit_dir));
f->common.angle_speed *= -4.f;
f->recover_ttl = NINJA_RECOVER_TTL;
f->spin_angle = .2f + .2f*frand();
if (irand(2))
f->spin_angle = -f->spin_angle;
}
}
return r;
}
static void _control_camera(Game* G, float delta_time)
{
if(G->num_points == 1) {
Vec2 curr = G->points[0].pos;
Vec2 delta = vec2_sub(curr, G->prev_single);
/* L-R rotation */
Quaternion q = quat_from_axis_anglef(0, 1, 0, delta_time*delta.x*0.2f);
G->camera.orientation = quat_multiply(G->camera.orientation, q);
/* U-D rotation */
q = quat_from_axis_anglef(1, 0, 0, delta_time*delta.y*0.2f);
G->camera.orientation = quat_multiply(q, G->camera.orientation);
G->prev_single = curr;
} else if(G->num_points == 2) {
float camera_speed = 0.1f;
Vec3 look = quat_get_z_axis(G->camera.orientation);
Vec3 right = quat_get_x_axis(G->camera.orientation);
Vec2 avg = vec2_add(G->points[0].pos, G->points[1].pos);
Vec2 delta;
avg = vec2_mul_scalar(avg, 0.5f);
delta = vec2_sub(avg, G->prev_double);
look = vec3_mul_scalar(look, -delta.y*camera_speed);
right = vec3_mul_scalar(right, delta.x*camera_speed);
G->camera.position = vec3_add(G->camera.position, look);
G->camera.position = vec3_add(G->camera.position, right);
G->prev_double = avg;
}
}
static void
foe_add_trail(const vector2 *pos, const vector2 *dir, int palette)
{
const int nparticles = 3 + irand(7);
int i;
vector2 tp = *pos, e = *dir;
vec2_mul_scalar(&e, 1.02f);
vec2_sub_from(&tp, &e);
for (i = 0; i < nparticles; i++) {
particle *p = add_particle();
if (!p)
break;
p->ttl = 15 + irand(15);
p->t = 0;
p->palette = palette;
p->width = p->height = .2f + .1f*frand();
p->pos.x = tp.x + .2f*frand() - .1f;
p->pos.y = tp.y + .2f*frand() - .1f;
vec2_set(&p->dir, 1, 0);
p->speed = 0.f;
p->friction = .9f;
}
}
static void
foe_common_spawn(struct foe_common *f, const vector2 *source, int type)
{
vector2 *pos = &f->pos;
vector2 *dir = &f->dir;
float speed;
f->used = 1;
*pos = *source;
speed = .05f + .05f*frand();
dir->x = frand() - .5f;
dir->y = frand() - .5f;
vec2_mul_scalar(dir, speed/vec2_length(dir));
f->tics = 0;
f->type = type;
f->angle = 0;
f->angle_speed = 5.f*frand();
f->rot_axis.x = frand() - .5f;
f->rot_axis.y = frand() - .5f;
f->rot_axis.z = frand() - .5f;
vec3_normalize(&f->rot_axis);
foe_data[f->type].create_fn((foe *)f);
}
static void
evolved_duck_create(struct foe_evolved_duck *f)
{
f->num_trail_segs = 1;
f->trail_seg_head = 0;
f->trail_seg[f->trail_seg_head] = f->common.pos;
f->trail_texture_id = duck_trail;
f->max_turn_angle = MAX_EVOLVED_DUCK_TURN_ANGLE;
vec2_mul_scalar(&f->common.dir, .1f);
}
static void
brute_update(struct foe_brute *f)
{
vector2 *dir = &f->common.dir;
vector2 s = ship.pos;
vec2_sub_from(&s, &f->common.pos);
vec2_mul_scalar(&s, .004f);
vec2_add_to(dir, &s);
foe_common_update(&f->common);
hit_ship(&f->common.pos, foe_data[FOE_BRUTE].radius);
if (vec2_length(dir) > foe_data[FOE_BRUTE].max_speed);
vec2_mul_scalar(dir, .7);
if (f->common.angle_speed > BRUTE_MAX_ANGLE_SPEED)
f->common.angle_speed *= .7;
if (brute_is_recovering(f))
foe_add_trail(&f->common.pos, &f->common.dir, PAL_YELLOW);
}
void add_touch_points(Game* G, int num_touch_points, TouchPoint* points)
{
int ii;
for(ii=0;ii<num_touch_points;++ii) {
G->points[G->num_points++] = points[ii];
}
if(G->num_points == 1) {
G->prev_single = G->points[0].pos;
G->tap_timer = 0.0f;
} else if(G->num_points == 2) {
Vec2 avg = vec2_add(G->points[0].pos, G->points[1].pos);
avg = vec2_mul_scalar(avg, 0.5f);
G->prev_double = avg;
}
}
static void
jarhead_update(struct foe_jarhead *f)
{
switch (f->state) {
case JARHEAD_ALIVE:
{ vector2 *dir = &f->common.dir;
vector2 s = ship.pos;
vec2_sub_from(&s, &f->common.pos);
vec2_mul_scalar(&s, .0003f);
vec2_add_to(dir, &s);
foe_common_update(&f->common);
hit_ship(&f->common.pos,
foe_data[f->common.type].radius);
vec2_clamp_length(dir,
foe_data[f->common.type].max_speed);
}
break;
case JARHEAD_EXPLODING:
if (--f->ttl <= 0) {
foe_common_gen_explosion(&f->common, 1.f);
kill_foe(&f->common);
} else {
vector2 *dir = &f->common.dir;
foe_common_update(&f->common);
/* spiral */
vec2_rotate(dir, f->spin_angle);
vec2_add_to(dir, &f->hit_dir);
vec2_clamp_length(dir,
JARHEAD_MAX_EXPLODING_SPEED);
/* trail */
foe_add_trail(&f->common.pos, &f->common.dir,
PAL_YELLOW);
}
break;
default:
assert(0);
}
}
static void
get_foe_pos_for_border_generator(struct foe_generator *generator, vector2 *pos,
int foe_type)
{
const int border = generator->border;
const vector2 *p0 = &cur_arena->verts[border];
const vector2 *p1 = &cur_arena->verts[(border + 1)%cur_arena->nverts];
vector2 n;
float t;
n.x = -(p1->y - p0->y);
n.y = p1->x - p0->x;
vec2_mul_scalar(&n, 1.5*foe_data[foe_type].radius/vec2_length(&n));
t = frand();
pos->x = p0->x + t*(p1->x - p0->x) + n.x;
pos->y = p0->y + t*(p1->y - p0->y) + n.y;
}
void remove_touch_points(Game* G, int num_touch_points, TouchPoint* points)
{
int orig_num_points = G->num_points;
int ii, jj;
for(ii=0;ii<orig_num_points;++ii) {
for(jj=0;jj<num_touch_points;++jj) {
if(G->points[ii].index == points[jj].index) {
/* This is the removed touch, swap it with the end of the list */
G->points[ii] = G->points[--G->num_points];
break;
}
}
}
if(G->num_points == 1) {
G->prev_single = G->points[0].pos;
} else if(G->num_points == 2) {
Vec2 avg = vec2_add(G->points[0].pos, G->points[1].pos);
avg = vec2_mul_scalar(avg, 0.5f);
G->prev_double = avg;
} else {
if(G->tap_timer < 0.5f) {
if(G->prev_single.x < G->width/2) {
if(G->prev_single.y < G->height/2) { // Top Left
cycle_renderers(G->graphics);
} else { // bottom left
G->dynamic_lights = !G->dynamic_lights;
}
} else {
if(G->prev_single.y < G->height/2) { // Top right
} else { // bottom right
}
}
}
}
}
static int
brute_hit(struct foe_brute *f, const vector2 *hit)
{
const vector2 *pos = &f->common.pos;
const float radius = foe_data[FOE_BRUTE].radius;
if (vec2_distance_squared(hit, pos) < radius*radius) {
if (--f->hit_count == 0) {
foe_common_gen_explosion(&f->common, 1.3f);
kill_foe(&f->common);
foe_common_bump_score(&f->common);
} else {
vector2 s, os;
float t;
f->last_hit_tic = gc.level_tics;
s = f->common.pos;
vec2_sub_from(&s, &ship.pos);
vec2_normalize(&s);
vec2_set(&os, -s.y, s.x);
t = 5.f*(frand() - .5f);
s.x += t*os.x;
s.y += t*os.y;
vec2_mul_scalar(&s, .3f/vec2_length(&s));
vec2_add_to(&f->common.dir, &s);
f->common.angle_speed *= 2;
}
return 1;
}
return 0;
}
static void
gen_explosion(float x, float y)
{
int i, n, c;
particle *p;
n = 150 + irand(150);
c = irand(NUM_PALETTES);
for (i = 0; i < n; i++) {
vector2 offs;
p = add_particle();
if (!p)
break;
p->ttl = 20 + irand(20);
p->t = 0;
p->width = .3f*(.6f + .1f*frand());
p->height = .3f*(2.8f + .4f*frand());
p->pos.x = x;
p->pos.y = y;
p->palette = c;
vec2_set(&p->dir, frand() - .5f, frand() - .5f);
vec2_normalize(&p->dir);
offs = p->dir;
vec2_mul_scalar(&offs, 1.3f*frand());
vec2_add_to(&p->pos, &offs);
p->speed = PARTICLE_SPEED + .05f*frand();
p->friction = .96f;
}
}
static void
evolved_duck_draw(struct foe_evolved_duck *f)
{
float u, du;
float t, s, hs;
int i, j, k;
glPushAttrib(GL_ALL_ATTRIB_BITS);
glDisable(GL_LIGHTING);
glShadeModel(GL_FLAT);
glDisable(GL_CULL_FACE);
glEnable(GL_TEXTURE_2D);
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glBindTexture(GL_TEXTURE_2D, gl_texture_id(f->trail_texture_id));
glDisable(GL_DEPTH_TEST);
s = vec2_length(&f->common.dir);
hs = .5f*foe_data[f->common.type].max_speed;
if (s < hs)
t = 0.f;
else
t = (s - hs)/hs;
glColor4f(t, t, t, t);
glBegin(GL_TRIANGLE_STRIP);
if (f->num_trail_segs > 1) {
vector2 d, n, *from, *to;
/* head */
j = f->trail_seg_head;
k = f->trail_seg_head - 1;
if (k < 0)
k = MAX_TRAIL_SEGS - 1;
from = &f->trail_seg[j];
to = &f->trail_seg[k];
d.x = -(to->y - from->y);
d.y = to->x - from->x;
#define HS 3.f
#define HL 1.5
vec2_mul_scalar(&d, .5f*HL/vec2_length(&d));
assert(from->x == f->common.pos.x);
assert(from->y == f->common.pos.y);
n.x = from->x + HS*f->common.dir.x;
n.y = from->y + HS*f->common.dir.y;
glTexCoord2f(0, 0);
glVertex3f(n.x - d.x, n.y - d.y, 0);
glTexCoord2f(1, 0);
glVertex3f(n.x + d.x, n.y + d.y, 0);
/* tail */
/* draw tail */
#define START_U .15f
du = (1.f - START_U)/f->num_trail_segs;
u = START_U;
j = f->trail_seg_head;
for (i = 0; i < f->num_trail_segs - 1; i++) {
vector2 d, *from, *to;
k = j - 1;
if (k < 0)
k = MAX_TRAIL_SEGS - 1;
from = &f->trail_seg[j];
to = &f->trail_seg[k];
d.x = -(to->y - from->y);
d.y = to->x - from->x;
if (i < f->num_trail_segs - 2) {
vector2 *next_to;
int l = k - 1;
if (l < 0)
l = MAX_TRAIL_SEGS - 1;
next_to = &f->trail_seg[l];
d.x += -(next_to->y - to->y);
d.y += next_to->x - to->x;
}
assert(vec2_length_squared(&d) > 0.f);
vec2_mul_scalar(&d, .5f*HL/vec2_length(&d));
glTexCoord2f(0, u);
glVertex3f(from->x - d.x, from->y - d.y, 0.f);
glTexCoord2f(1, u);
glVertex3f(from->x + d.x, from->y + d.y, 0.f);
j = k;
u += du;
}
}
glEnd();
glPopAttrib();
{
float dir_angle = f->common.angle = 180.f +
360.f*atan2(-f->common.dir.x, f->common.dir.y)/
2.f/M_PI;
glPushMatrix();
glTranslatef(f->common.pos.x, f->common.pos.y, 0.f);
glRotatef(dir_angle, 0, 0, 1);
glRotatef(f->common.angle, 0, 1, 0);
if (f->common.tics < SPAWN_TICS) {
static const struct rgb white = { 0.f, 1.f, 1.f };
float s = (float)f->common.tics/SPAWN_TICS;
mesh_render_modulate_color(foe_meshes[f->common.type], &white, s);
} else {
mesh_render(foe_meshes[f->common.type]);
}
glPopMatrix();
}
}
static void
evolved_duck_update(struct foe_evolved_duck *f)
{
vector2 d, od, t;
float r;
int ship_is_behind;
foe_common_update(&f->common);
if (foe_bounced) {
f->num_trail_segs = 0;
} else {
if (f->num_trail_segs < MAX_TRAIL_SEGS)
f->num_trail_segs++;
if (++f->trail_seg_head >= MAX_TRAIL_SEGS)
f->trail_seg_head = 0;
f->trail_seg[f->trail_seg_head] = f->common.pos;
}
hit_ship(&f->common.pos, foe_data[f->common.type].radius);
od.x = ship.pos.x - f->common.pos.x;
od.y = ship.pos.y - f->common.pos.y;
vec2_normalize(&od);
t.x = -f->common.dir.y;
t.y = f->common.dir.x;
ship_is_behind = vec2_dot_product(&od, &t) > 0;
/* accelerate if behind ship, brake otherwise */
if (ship_is_behind)
vec2_mul_scalar(&f->common.dir, .99f);
else
vec2_mul_scalar(&f->common.dir, 1.2f);
/* turn towards ship */
d.x = -(ship.pos.y - f->common.pos.y);
d.y = ship.pos.x - f->common.pos.x;
vec2_normalize(&d);
r = 1.6f*vec2_dot_product(&d, &f->common.dir);
if (r < 0) {
if (ship_is_behind)
r = -f->max_turn_angle;
else {
if (r < -f->max_turn_angle)
r = -f->max_turn_angle;
}
} else {
if (ship_is_behind) {
r = f->max_turn_angle;
} else {
if (r > f->max_turn_angle)
r = f->max_turn_angle;
}
}
vec2_rotate(&f->common.dir, r);
vec2_clamp_length(&f->common.dir, foe_data[f->common.type].max_speed);
}