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stage00.c
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/***************************************************************
stage00.c
first acomplished attempt to render and move nick around
and make camera follow him!
***************************************************************/
#include <math.h>
#include <nusys.h>
#include <string.h> // Needed for CrashSDK compatibility
#include "config.h"
#include "structs.h"
#include "helper.h"
#include "sausage64.h"
#include "texcube.h"
#include "palette.h"
#include "nick.h"
#include "willy.h"
#include "ground_block.h"
#include "candy.h"
#include "pumpkin.h"
#include "gravestone.h"
#include "gravestone_cross.h"
#include "gravestone_flat.h"
#include "gravestone_flat_2.h"
#include "tree1clear.h"
#include "tree1grey.h"
#include "tree1dark.h"
#include "tree2clear.h"
#include "tree2grey.h"
#include "tree2dark.h"
#include "tree3.h"
#include "tree4.h"
#include "tree5.h"
#include "entrance.h"
#include "fence.h"
#include "shack.h"
#include "axisMdl.h"
#include "debug.h"
/*********************************
Macros
*********************************/
#define USB_BUFFER_SIZE 256
#define COS_45 0.7071
/*********************************
Function Prototypes
*********************************/
float get_time();
float rad(float angle);
float deg(float rad);
int lim(u32 input);
void time_management(TimeData *time);
void move_entity_analog_stick(Entity *entity, Camera camera, NUContData cont[1]);
void handle_camera_c_buttons(Camera *camera, NUContData cont[1]);
void move_entity_c_buttons(Entity *entity, Camera camera, NUContData cont[1]);
void handle_camera_analog_stick(Camera *camera, NUContData cont[1]);
void get_cam_position(Camera *camera, Entity *entity);
void move_cam(Camera *camera, Entity* entity, NUContData cont[1]);
void set_light(LightData *light);
void set_cam(Camera *camera, Entity entity);
void set_entity_state(AnimatedEntity * animated_entity, entity_state new_state);
void animate_nick(NUContData cont[1]);
void nick_animcallback(u16 anim);
void willy_animcallback(u16 anim);
void draw_animated_entity(AnimatedEntity *entity);
void draw_static_entity(StaticEntity *static_entity);
void draw_world(AnimatedEntity *entity, Camera *camera, LightData *light);
void draw_debug_data();
/*********************************
Globals
*********************************/
//Variables
TimeData time_data = {
FPS_index: 0,
};
float animspeed;
// Camera
Camera cam = {
distance_from_entity: 700,
pitch: 30,
angle_around_entity: 0,
};
LightData light_data = {
angle: { 0, 0, -90},
ambcol: 100,
};
// Entities
AnimatedEntity nick = {
entity: {
pos: { 0, 0, 0},
type: NICK,
health: 100,
damage: 10,
ammo: 10
}
};
Mtx nickMtx[MESHCOUNT_nick];
AnimatedEntity willy = {
entity: {
pos: { 400, 400, 0},
yaw: 180,
type: WILLY
}
};
Mtx willyMtx[MESHCOUNT_willy];
StaticEntity axis = {
entity: {
pos: { 0, 0, 0},
scale: 1,
},
mesh: gfx_axis,
};
#define WIDTH_GROUND_SEGMENTS 5
#define HEIGHT_GROUND_SEGMENTS 5
#define GROUND_SEGMENTS_COUNT 25 // this should be the previous two multiplied together
StaticEntity ground_segments[GROUND_SEGMENTS_COUNT]= {};
StaticEntity candy = {
entity: {
pos: { -500, 500, 150},
scale: 1,
},
mesh: gfx_candy,
};
#define SCENERY_COUNT 35
StaticEntity scenery[SCENERY_COUNT] = {
{entity : {pos : {-300, 300, 30}, scale : 1}, mesh : gfx_pumpkin},
{entity : {pos : {-300, 350, 30}, scale : 1}, mesh : gfx_pumpkin},
{entity : {pos : {-240, 350, 30}, scale : 1}, mesh : gfx_pumpkin},
{entity : {pos : {-120, 250, 30}, scale : 1}, mesh : gfx_pumpkin},
{entity : {pos : {-300, 300, 30}, scale : 1}, mesh : gfx_pumpkin},
{entity : {pos : {-300, 350, 30}, scale : 1}, mesh : gfx_pumpkin},
{entity : {pos : {-240, 350, 30}, scale : 1}, mesh : gfx_pumpkin},
{entity : {pos : {-120, 250, 30}, scale : 1}, mesh : gfx_pumpkin},
{entity : {pos : {300, 300, 30}, scale : 1}, mesh : gfx_gravestone},
{entity : {pos : {300, -300, 30}, scale : 1}, mesh : gfx_gravestone_cross},
{entity : {pos : {300, -600, 30}, scale : 1}, mesh : gfx_gravestone_flat},
{entity : {pos : {300, 500, 30}, scale : 1}, mesh : gfx_gravestone_flat_2},
{entity : {pos : {-200, 400, 30}, scale : 15}, mesh : gfx_tree1clear},
{entity : {pos : {-100, 800, 30}, scale : 15}, mesh : gfx_tree2clear},
{entity : {pos : {0, -300, 30}, scale : 15}, mesh : gfx_tree3},
{entity : {pos : {-600, 200, 30}, scale : 15}, mesh : gfx_tree4},
{entity : {pos : {-1500, 900, 30}, scale : 15}, mesh : gfx_tree5},
{entity : {pos : {600, -4325, 30}, scale : 2, yaw : 180}, mesh : gfx_fence},
{entity : {pos : {-350, -4325, 30}, scale : 2, yaw : 0}, mesh : gfx_fence},
{entity : {pos : {600, -3325, 30}, scale : 2, yaw : 270}, mesh : gfx_fence},
{entity : {pos : {-350, -3325, 30}, scale : 2, yaw : 270}, mesh : gfx_fence},
{entity : {pos : {1610, -3325, 30}, scale : 2, yaw : 180}, mesh : gfx_fence},
{entity : {pos : {-1350, -3325, 30}, scale : 2, yaw : 0}, mesh : gfx_fence},
{entity : {pos : {2200, -2500, 30}, scale : 2, yaw : 235}, mesh : gfx_fence},
{entity : {pos : {-2150, -2500, 30}, scale : 2, yaw : 315}, mesh : gfx_fence},
{entity : {pos : {2200, -1500, 30}, scale : 2, yaw : 270}, mesh : gfx_fence},
{entity : {pos : {-2150, -1500, 30}, scale : 2, yaw : 270}, mesh : gfx_fence},
{entity : {pos : {-2150, -500, 30}, scale : 2, yaw : 270}, mesh : gfx_fence},
{entity : {pos : {2200, -500, 30}, scale : 2, yaw : 270}, mesh : gfx_fence},
{entity : {pos : {2200, -500, 30}, scale : 2, yaw : 135}, mesh : gfx_fence},
{entity : {pos : {-1450, 200, 30}, scale : 2, yaw : 225}, mesh : gfx_fence},
{entity : {pos : {-450, 200, 30}, scale : 2, yaw : 180}, mesh : gfx_fence},
{entity : {pos : {1500, 200, 30}, scale : 2, yaw : 180}, mesh : gfx_fence},
{entity : {pos : {0, 200, 30}, scale : 2}, mesh : gfx_entrance},
{entity : {pos : {2000, 2000, 0}, scale: 1}, mesh : gfx_shack},
};
// USB
static char uselight = TRUE;
static char drawaxis = TRUE;
static char freezelight = FALSE;
static char usb_buffer[USB_BUFFER_SIZE];
/*==============================
get_time
returns time in seconds
==============================*/
float get_time(){
float time = (s32)OS_CYCLES_TO_USEC(osGetTime()) / 1000000.0f;
return time;
}
/*==============================
cycles_to_sec
converts cycles to seconds
==============================*/
float cycles_to_sec(OSTime cycles){
float time = (s32)OS_CYCLES_TO_USEC(cycles) / 1000000.0f;
return time;
}
/*==============================
rad & deg
convert between angles and radians
==============================*/
float rad(float angle){
float radian = M_PI / 180 * angle;
return radian;
}
float deg(float rad){
float angle = 180 / M_PI * rad;
return angle;
}
/*==============================
lim
auxiliary function for 8 directional movement
==============================*/
int lim(u32 input){
if (input == 0) {return 0;}
else {return 1;}
}
/*==============================
time_management
calculates FPS and frame_duration variable
==============================*/
void time_management(TimeData *time){
time->cur_frame = osGetTime();
time->frame_duration = cycles_to_sec(time->cur_frame - time->last_frame);
time->FPS = 1 / time->frame_duration;
time->last_frame = time->cur_frame;
}
// https://en.wikipedia.org/wiki/Fast_inverse_square_root
float Q_rsqrt( float number )
{
long i;
float x2, y;
const float threehalfs = 1.5F;
x2 = number * 0.5F;
y = number;
i = * ( long * ) &y; // evil floating point bit level hacking
i = 0x5f3759df - ( i >> 1 ); // what the fuck?
y = * ( float * ) &i;
y = y * ( threehalfs - ( x2 * y * y ) ); // 1st iteration
// y = y * ( threehalfs - ( x2 * y * y ) ); // 2nd iteration, this can be removed
return y;
}
/*==============================
move_entity
Moves entity with analog stick
==============================*/
int curr_nick_state;
void move_entity_analog_stick(Entity *entity, Camera camera, NUContData cont[1]){
if (fabs(cont->stick_x) < 7){cont->stick_x = 0;}
if (fabs(cont->stick_y) < 7){cont->stick_y = 0;}
int curr_state = entity->state;
curr_nick_state = curr_state;
if (curr_state != ROLL
&& curr_state != JUMP
&& curr_state != FALLBACK
&& curr_state != FALL
&& curr_state != MIDAIR
) {
if ((cont->stick_x != 0 || cont->stick_y != 0)) {
entity->yaw = deg(atan2(cont->stick_x, -cont->stick_y) - rad(camera.angle_around_entity));
entity->speed = 1/Q_rsqrt(cont->stick_x * cont->stick_x + cont->stick_y * cont->stick_y) * 12;
}
if ( cont->stick_x == 0 && cont->stick_y == 0) {
entity->speed = 0;
}
}
}
void move_entity_one_frame(Entity *entity){
float frame_distance = time_data.frame_duration * entity->speed;
entity->pos[0] += frame_distance * sin(rad(entity->yaw));
entity->pos[1] -= frame_distance * cos(rad(entity->yaw));
}
void move_animated_entity_one_frame(AnimatedEntity *animated_entity){
Entity *entity = &animated_entity->entity;
int GRAVITY = 14;
// apply some gravity
if (entity->pos[2] > 0 || entity->vertical_speed > 0 || entity->vertical_speed < 0 ) {
if (entity->type == WILLY && entity->state == FALLBACK) {
// TODO hacky standin "animation" for willy getting hit, jump up and fall back fast
//entity->vertical_speed -= 1200;
} else {
entity->vertical_speed -= GRAVITY;
}
entity->pos[2] += time_data.frame_duration * entity->vertical_speed;
if (entity->pos[2] < 0) {
entity->vertical_speed = 0;
entity->pos[2] = 0;
set_entity_state(animated_entity, IDLE);
}
}
move_entity_one_frame(entity);
}
/*==============================
handle_camera_c_buttons
handles pitch, distance_from_entity
and angle_around_entity variables
==============================*/
void handle_camera_c_buttons(Camera *camera, NUContData cont[1]){
if (cont[0].trigger & U_CBUTTONS && camera->distance_from_entity == 2000){
camera->distance_from_entity = 1200;
camera->pitch = 35;
} else
if (cont[0].trigger & U_CBUTTONS && camera->distance_from_entity == 1200){
camera->distance_from_entity = 700;
camera->pitch = 30;
}
if (cont[0].trigger & D_CBUTTONS && camera->distance_from_entity == 700){
camera->distance_from_entity = 1200;
camera->pitch = 35;
} else
if (cont[0].trigger & D_CBUTTONS && camera->distance_from_entity == 1200){
camera->distance_from_entity = 2000;
camera->pitch = 40;
}
if (cont[0].trigger & L_CBUTTONS){
camera->angle_around_entity -= 15;
}
if (cont[0].trigger & R_CBUTTONS && camera->angle_around_entity == 0){
camera->angle_around_entity = 360;
camera->angle_around_entity += 15;
}else
if (cont[0].trigger & R_CBUTTONS){
camera->angle_around_entity += 25;
}
if (camera->angle_around_entity == 360){
camera->angle_around_entity = 0;
}
}
/*==============================
move_entity_c_buttons
Moves entity with c buttons
==============================*/
void move_entity_c_buttons(Entity *entity, Camera camera, NUContData cont[1]){
entity->forward_speed = lim(contdata[0].button & U_CBUTTONS) - lim(contdata[0].button & D_CBUTTONS);
entity->side_speed = lim(contdata[0].button & L_CBUTTONS) - lim(contdata[0].button & R_CBUTTONS);
if (entity->forward_speed != 0 || entity->side_speed != 0) {
entity->yaw = deg(atan2(-entity->side_speed, -entity->forward_speed) - rad(camera.angle_around_entity));
}
if (entity->forward_speed != 0 && entity->side_speed != 0){
entity->forward_speed = entity->forward_speed * COS_45;
entity->side_speed = entity->side_speed * COS_45;
}
float frame_distance_forward = time_data.frame_duration * entity->forward_speed * 500;
float frame_distance_side = time_data.frame_duration * entity->side_speed * 500;
entity->pos[0] += frame_distance_forward * sin(rad(camera.angle_around_entity));
entity->pos[1] += frame_distance_forward * cos(rad(camera.angle_around_entity));
entity->pos[0] += frame_distance_side * sin(rad(camera.angle_around_entity - 90));
entity->pos[1] += frame_distance_side * cos(rad(camera.angle_around_entity - 90));
}
/*==============================
handle_camera_analog_stick
moves camera with analog stick
==============================*/
void handle_camera_analog_stick(Camera *camera, NUContData cont[1]){
if (fabs(cont->stick_x) < 7){cont->stick_x = 0;}
if (fabs(cont->stick_y) < 7){cont->stick_y = 0;}
camera->angle_around_entity += cont->stick_x / 40;
camera->pitch += cont->stick_y / 40;
if (cam.angle_around_entity > 360) {cam.angle_around_entity = 0;}
if (cam.angle_around_entity < 0) {cam.angle_around_entity = 360;}
if (cam.angle_around_entity > 360) {cam.angle_around_entity = 0;}
if (cam.angle_around_entity < 0) {cam.angle_around_entity = 360;}
if (cam.pitch > 85) {cam.pitch = 85;}
if (cam.pitch < -85) {cam.pitch = -85;}
}
/*==============================
get_cam_position
calculates camera coordinates
==============================*/
void get_cam_position(Camera *camera, Entity *entity){
camera->horizontal_distance_from_entity = camera->distance_from_entity * cos(rad(camera->pitch));
camera->vertical_distance_from_entity = camera->distance_from_entity * sin(rad(camera->pitch));
camera->pos[0] = entity->pos[0] - camera->horizontal_distance_from_entity * sin(rad(camera->angle_around_entity));
camera->pos[1] = entity->pos[1] - camera->horizontal_distance_from_entity * cos(rad(camera->angle_around_entity));
camera->pos[2] = camera->vertical_distance_from_entity + 1/Q_rsqrt(entity->pos[2]);
if ((camera->vertical_distance_from_entity + entity->pos[2]) < 5){cam.pos[2] = 5;}
}
/*==============================
move_cam
Controls camera movement
==============================*/
void move_cam(Camera *camera, Entity *entity, NUContData cont[1]){
handle_camera_c_buttons(camera, cont);
//handle_camera_analog_stick(camera, cont);
get_cam_position(camera, entity);
}
/*==============================
set_light
Sets the lights
==============================*/
void set_light(LightData *light){
int i;
// Setup the lights
if (!uselight)
light->ambcol = 255;
for (i=0; i<3; i++){
light->amb.l.col[i] = light->ambcol;
light->amb.l.colc[i] = light->ambcol;
light->dir.l.col[i] = 255;
light->dir.l.colc[i] = 255;
}
// handle the light direction so it's always projecting from the camera's position
if (!freezelight){
light->dir.l.dir[0] = -127*sinf(light->angle[0]*0.0174532925);
light->dir.l.dir[1] = 127*sinf(light->angle[2]*0.0174532925)*cosf(light->angle[0]*0.0174532925);
light->dir.l.dir[2] = 127*cosf(light->angle[2]*0.0174532925)*cosf(light->angle[0]*0.0174532925);
}
// Send the light struct to the RSP
gSPNumLights(glistp++, NUMLIGHTS_1);
gSPLight(glistp++, &light->dir, 1);
gSPLight(glistp++, &light->amb, 2);
gDPPipeSync(glistp++);
}
/*==============================
set_cam
Sets the camera
==============================*/
void set_cam(Camera *camera, Entity entity){
// Setup the cam.projection matrix
guPerspective(
&camera->projection, &camera->normal,
45, (float)SCREEN_WD / (float)SCREEN_HT,
10.0, 10000.0, 0.01);
guLookAt(
&camera->viewpoint,
camera->pos[0], camera->pos[1], camera->pos[2],
entity.pos[0], entity.pos[1], 1/Q_rsqrt(entity.pos[2]) + 120,
0, 0, 1
);
// Apply the cam.projection matrix
gSPMatrix(glistp++, &camera->projection, G_MTX_PROJECTION | G_MTX_LOAD | G_MTX_NOPUSH);
gSPMatrix(glistp++, &camera->viewpoint, G_MTX_PROJECTION | G_MTX_MUL | G_MTX_NOPUSH);
gSPPerspNormalize(glistp++, &camera->normal);
// Initialize the model matrix
guMtxIdent(&camera->modeling);
gSPMatrix(glistp++, &camera->modeling, G_MTX_MODELVIEW | G_MTX_LOAD | G_MTX_NOPUSH);
}
void update_animation_based_on_state(AnimatedEntity * animated_entity) {
entity_state new_state = animated_entity->entity.state;
s64ModelHelper* helper = &animated_entity->helper;
if (animated_entity->entity.type == NICK) {
if (new_state == JUMP) sausage64_set_anim(helper, ANIMATION_nick_jump);
if (new_state == ROLL) sausage64_set_anim(helper, ANIMATION_nick_roll);
if (new_state == FALLBACK) sausage64_set_anim(helper, ANIMATION_nick_fallback);
if (new_state == FALL) sausage64_set_anim(helper, ANIMATION_nick_fall);
if (new_state == MIDAIR) sausage64_set_anim(helper, ANIMATION_nick_midair);
if (new_state == IDLE) sausage64_set_anim(helper, ANIMATION_nick_idle);
if (new_state == WALK) sausage64_set_anim(helper, ANIMATION_nick_walk);
if (new_state == RUN) sausage64_set_anim(helper, ANIMATION_nick_run);
} else if (animated_entity->entity.type == WILLY) {
// TODO - handle states that willy can't be in somewhere
if (new_state == JUMP) sausage64_set_anim(helper, ANIMATION_willy_jump);
if (new_state == ROLL) sausage64_set_anim(helper, ANIMATION_willy_spinattack);
if (new_state == FALLBACK) sausage64_set_anim(helper, ANIMATION_willy_fall_ahead);
if (new_state == IDLE) sausage64_set_anim(helper, ANIMATION_willy_idle);
if (new_state == RUN) sausage64_set_anim(helper, ANIMATION_willy_run);
}
}
void set_entity_state(AnimatedEntity * animated_entity, entity_state new_state) {
Entity * entity = &animated_entity->entity;
int curr_state = entity->state;
if (curr_state == new_state) {
return;
}
if (new_state == JUMP &&
( curr_state == IDLE
|| curr_state == WALK
|| curr_state == RUN)) {
entity->state = new_state;
update_animation_based_on_state(animated_entity);
animated_entity->entity.vertical_speed = 600;
}
if (new_state == ROLL &&
( curr_state == IDLE
|| curr_state == WALK
|| curr_state == RUN )) {
entity->state = new_state;
update_animation_based_on_state(animated_entity);
animated_entity->entity.speed = 800;
}
if (new_state == WALK && curr_state == IDLE) {
entity->state = new_state;
update_animation_based_on_state(animated_entity);
}
if (new_state == RUN &&
( curr_state == IDLE || curr_state == WALK)) {
entity->state = new_state;
update_animation_based_on_state(animated_entity);
// TODO - just to make willy move, gets overriden by controller for user
animated_entity->entity.speed = 200;
}
if (new_state == IDLE
&& ( curr_state == WALK
|| curr_state == RUN
|| curr_state == ROLL
|| curr_state == FALL
|| curr_state == FALLBACK
|| curr_state == JUMP
)
) {
entity->state = new_state;
update_animation_based_on_state(animated_entity);
animated_entity->entity.speed = 0;
}
if (new_state == MIDAIR) {
entity->state = new_state;
update_animation_based_on_state(animated_entity);
}
if (new_state == FALL) {
entity->state = new_state;
update_animation_based_on_state(animated_entity);
}
if (new_state == FALLBACK) {
entity->state = new_state;
update_animation_based_on_state(animated_entity);
}
}
/*==============================
animate_nick & animate_willy
link entity animations to controller input
==============================*/
void handle_controller_input(NUContData cont[1], AnimatedEntity* entity){
if (cont[0].trigger & R_TRIG) {
candy.entity.pos[0] = entity->entity.pos[0];
candy.entity.pos[1] = entity->entity.pos[1];
candy.entity.pos[2] = entity->entity.pos[2] + 50;
candy.entity.speed = 3000;
candy.entity.yaw = entity->entity.yaw;
}
if (cont[0].trigger & A_BUTTON) set_entity_state(entity, JUMP);
if (cont[0].trigger & B_BUTTON) set_entity_state(entity, ROLL);
if (entity->entity.speed > 900) {
set_entity_state(entity, RUN);
} else if (cont->stick_x != 0 || cont->stick_y != 0) {
set_entity_state(entity, WALK);
}
if (cont->stick_x == 0 && cont->stick_y == 0
&& entity->entity.state != JUMP
&& entity->entity.state != ROLL
&& entity->entity.state != FALLBACK
&& entity->entity.state != FALL
&& entity->entity.state != MIDAIR
) {
set_entity_state(entity, IDLE);
}
//handle movement
move_entity_analog_stick(&entity->entity, cam, contdata);
//move_entity_c_buttons(entity.entity, cam, contdata);
move_cam(&cam, &entity->entity, contdata);
}
void when_animation_completes(AnimatedEntity * animated_entity) {
// Go to idle animation when we finished attacking
switch(animated_entity->entity.state)
{
case JUMP:
set_entity_state(animated_entity, MIDAIR);
break;
case MIDAIR:
set_entity_state(animated_entity, FALL);
break;
case FALL:
set_entity_state(animated_entity, IDLE);
break;
case ROLL:
case FALLBACK:
set_entity_state(animated_entity, IDLE);
animated_entity->entity.speed = 0;
break;
}
}
/*==============================
animcallback
Called before an animation finishes
==============================*/
void nick_animcallback(u16 anim){
// yes this currently ignores the passed in animation, might not be bad to verify we are finishing
// the animation we are expecting, but this way the logic for where we go when transitioning out of
// a given state can be shared across different animated entities, that can do some subset, of move/roll/run/etc.
when_animation_completes(&nick);
}
void willy_animcallback(u16 anim)
{
// Go to idle animation when we finished attacking
switch(willy.entity.state)
{
case JUMP:
set_entity_state(&willy, IDLE);
break;
case FALLBACK:
set_entity_state(&willy, IDLE);
willy.entity.speed = 0;
case ROLL:
set_entity_state(&willy, IDLE);
willy.entity.speed = 0;
break;
}
}
/*==============================
draw_animated_entity
draws animated entities
==============================*/
void draw_animated_entity(AnimatedEntity *animated_entity){
guTranslate(&animated_entity->entity.pos_mtx, animated_entity->entity.pos[0], animated_entity->entity.pos[1], animated_entity->entity.pos[2]);
guRotate(&animated_entity->entity.rot_mtx[0], animated_entity->entity.pitch, 1, 0, 0);
guRotate(&animated_entity->entity.rot_mtx[1], animated_entity->entity.yaw, 0, 0, 1);
gSPMatrix(glistp++, OS_K0_TO_PHYSICAL(&animated_entity->entity.pos_mtx), G_MTX_MODELVIEW | G_MTX_MUL | G_MTX_PUSH);
gSPMatrix(glistp++, OS_K0_TO_PHYSICAL(&animated_entity->entity.rot_mtx[0]), G_MTX_MODELVIEW | G_MTX_MUL | G_MTX_PUSH);
gSPMatrix(glistp++, OS_K0_TO_PHYSICAL(&animated_entity->entity.rot_mtx[1]), G_MTX_MODELVIEW | G_MTX_MUL | G_MTX_PUSH);
sausage64_drawmodel(&glistp, &animated_entity->helper);
gSPPopMatrix(glistp++, G_MTX_MODELVIEW);
gSPPopMatrix(glistp++, G_MTX_MODELVIEW);
gSPPopMatrix(glistp++, G_MTX_MODELVIEW);
}
/*==============================
draw_static_entity
draws static entities
==============================*/
void draw_static_entity(StaticEntity *static_entity){
guTranslate(&static_entity->entity.pos_mtx, static_entity->entity.pos[0], static_entity->entity.pos[1], static_entity->entity.pos[2]);
guRotate(&static_entity->entity.rot_mtx[0], static_entity->entity.pitch, 1, 0, 0);
guRotate(&static_entity->entity.rot_mtx[1], static_entity->entity.yaw, 0, 0, 1);
float scale = static_entity->entity.scale;
guScale(&static_entity->entity.scale_mtx, scale, scale, scale);
gSPMatrix(glistp++, OS_K0_TO_PHYSICAL(&static_entity->entity.pos_mtx), G_MTX_MODELVIEW | G_MTX_MUL | G_MTX_PUSH);
gSPMatrix(glistp++, OS_K0_TO_PHYSICAL(&static_entity->entity.rot_mtx[0]), G_MTX_MODELVIEW | G_MTX_MUL | G_MTX_PUSH);
gSPMatrix(glistp++, OS_K0_TO_PHYSICAL(&static_entity->entity.rot_mtx[1]), G_MTX_MODELVIEW | G_MTX_MUL | G_MTX_PUSH);
gSPMatrix(glistp++, OS_K0_TO_PHYSICAL(&static_entity->entity.scale_mtx), G_MTX_MODELVIEW | G_MTX_MUL | G_MTX_PUSH);
gSPDisplayList(glistp++, static_entity->mesh);
gSPPopMatrix(glistp++, G_MTX_MODELVIEW);
gSPPopMatrix(glistp++, G_MTX_MODELVIEW);
gSPPopMatrix(glistp++, G_MTX_MODELVIEW);
gSPPopMatrix(glistp++, G_MTX_MODELVIEW);
}
void set_pt(float* dest, float* src) {
dest[0] = src[0];
dest[1] = src[1];
dest[2] = src[2];
}
int get_static_entity_width(StaticEntity* static_entity) {
if (static_entity->mesh == gfx_shack) return 800;
}
int get_static_entity_depth(StaticEntity* static_entity) {
if (static_entity->mesh == gfx_shack) return 700;
}
float dot(float *u, float *v) {
return u[0] * v[0] + u[1] * v[1];
}
void vector(float *dest, float *p1, float *p2) {
dest[0] = p2[0] - p1[0];
dest[1] = p2[1] - p1[1];
}
// https://stackoverflow.com/questions/2752725/finding-whether-a-point-lies-inside-a-rectangle-or-not/37865332#37865332
// currently only looks at x and y, despite passing in 3d points
int pt_in_rect(float* pos1, Entity *entity, int width, int depth) {
float A[3]; float B[3]; float C[3]; float D[3];
float AB[3];float AM[3];float BC[3];float BM[3];
A[0] = entity->pos[0] + width / 2;
A[1] = entity->pos[1] + depth / 2;
B[0] = entity->pos[0] - width / 2;
B[1] = entity->pos[1] + depth / 2;
C[0] = entity->pos[0] - width / 2;
C[1] = entity->pos[1] - depth / 2;
D[0] = entity->pos[0] + width / 2;
D[1] = entity->pos[1] - depth / 2;
vector(AB, A, B);
vector(AM, A, pos1);
vector(BC, B, C);
vector(BM, B, pos1);
float dotABAM = dot(AB, AM);
float dotABAB = dot(AB, AB);
float dotBCBM = dot(BC, BM);
float dotBCBC = dot(BC, BC);
return 0 <= dotABAM && dotABAM <= dotABAB && 0 <= dotBCBM && dotBCBM <= dotBCBC;
// javascript for reference from the link above
/*
function pointInRectangle(m, r) {
var AB = vector(r.A, r.B);
var AM = vector(r.A, m);
var BC = vector(r.B, r.C);
var BM = vector(r.B, m);
var dotABAM = dot(AB, AM);
var dotABAB = dot(AB, AB);
var dotBCBM = dot(BC, BM);
var dotBCBC = dot(BC, BC);
return 0 <= dotABAM && dotABAM <= dotABAB && 0 <= dotBCBM && dotBCBM <= dotBCBC;
}
function vector(p1, p2) {
return {
x: (p2.x - p1.x),
y: (p2.y - p1.y)
};
}
function dot(u, v) {
return u.x * v.x + u.y * v.y;
}
var r = {
A: {x: 50, y: 0},
B: {x: 0, y: 20},
C: {x: 10, y: 50},
D: {x: 60, y: 30}
};
var m = {x: 40, y: 20};
pointInRectangle(m, r); // returns true.
*/
}
// show the bounding rectangle for an object (that is not rotated)
void debug_entity_collision_rect(StaticEntity* static_entity) {
scenery[0].entity.pos[0] = static_entity->entity.pos[0] + get_static_entity_width(static_entity) / 2;
scenery[0].entity.pos[1] = static_entity->entity.pos[1] + get_static_entity_depth(static_entity) / 2;
scenery[0].entity.pos[2] = static_entity->entity.pos[2];
scenery[1].entity.pos[0] = static_entity->entity.pos[0] - get_static_entity_width(static_entity) / 2;
scenery[1].entity.pos[1] = static_entity->entity.pos[1] + get_static_entity_depth(static_entity) / 2;
scenery[1].entity.pos[2] = static_entity->entity.pos[2];
scenery[2].entity.pos[0] = static_entity->entity.pos[0] - get_static_entity_width(static_entity) / 2;
scenery[2].entity.pos[1] = static_entity->entity.pos[1] - get_static_entity_depth(static_entity) / 2;
scenery[2].entity.pos[2] = static_entity->entity.pos[2];
scenery[3].entity.pos[0] = static_entity->entity.pos[0] + get_static_entity_width(static_entity) / 2;
scenery[3].entity.pos[1] = static_entity->entity.pos[1] - get_static_entity_depth(static_entity) / 2;
scenery[3].entity.pos[2] = static_entity->entity.pos[2];
}
float distance(float* pos1, float* pos2) {
return 1 / Q_rsqrt(
(pos1[0] - pos2[0]) * (pos1[0] - pos2[0])
+ (pos1[1] - pos2[1]) * (pos1[1] - pos2[1])
+ (pos1[2] - pos2[2]) * (pos1[2] - pos2[2])
);
}
// length of a line segment in x and y directions
// this is only 2D for now, but takes 3d pts
float length_squared(float *pos1, float *pos2) {
return
(pos1[0] - pos2[0]) * (pos1[0] - pos2[0])
+ (pos1[1] - pos2[1]) * (pos1[1] - pos2[1]);
}
float distance_2d(float* pos1, float* pos2) {
return 1 / Q_rsqrt(
(pos1[0] - pos2[0]) * (pos1[0] - pos2[0])
+ (pos1[1] - pos2[1]) * (pos1[1] - pos2[1])
);
}
float max(float a, float b) {
if (a > b) return a;
else return b;
}
float min(float a, float b) {
if (a < b) return a;
else return b;
}
float minimum_distance(float *v, float *w, float *p) {
// Return minimum distance between line segment vw and point p
const float l2 = length_squared(v, w); // i.e. |w-v|^2 - avoid a sqrt
if (l2 == 0.0) return distance_2d(p, v); // v == w case
// Consider the line extending the segment, parameterized as v + t (w - v).
// We find projection of point p onto the line.
// It falls where t = [(p-v) . (w-v)] / |w-v|^2
// We clamp t from [0,1] to handle points outside the segment vw.
float p_v[3] = {};
p_v[0] = p[0] - v[0];
p_v[1] = p[1] - v[1];
float w_v[3] = {};
w_v[0] = w[0] - v[0];
w_v[1] = w[1] - v[1];
const float t = max(0, min(1, dot(p_v, w_v) / l2));
float projection[3];
projection[0] = v[0] + t * (w[0] - v[0]);
projection[1] = v[1] + t * (w[1] - v[1]);
//const vec2 projection = v + t * (w - v); // Projection falls on the segment
return distance_2d(p, projection);
}
float min_dist_to_wall_old;
float min_dist_to_wall_new;
void detect_collisions() {
StaticEntity *shack = &scenery[SCENERY_COUNT - 1];
if ( pt_in_rect(nick.entity.pos, &scenery[SCENERY_COUNT - 1].entity, get_static_entity_width(shack), get_static_entity_depth(shack))) {
// just do the oposite of what we did to move this frame to get out of the wall
Entity *entity = &nick.entity;
// calculate if the next frame will move us out of the box
float new_pos[3] = {};
float frame_distance = time_data.frame_duration * entity->speed;
new_pos[0] = entity->pos[0] + frame_distance * sin(rad(entity->yaw));
new_pos[1] = entity->pos[1] - frame_distance * cos(rad(entity->yaw));
float A[3]; float B[3]; float C[3]; float D[3];
int width = get_static_entity_width(shack);
int depth = get_static_entity_depth(shack);
A[0] = entity->pos[0] + width / 2;
A[1] = entity->pos[1] + depth / 2;
B[0] = entity->pos[0] - width / 2;
B[1] = entity->pos[1] + depth / 2;
C[0] = entity->pos[0] - width / 2;
C[1] = entity->pos[1] - depth / 2;
D[0] = entity->pos[0] + width / 2;
D[1] = entity->pos[1] - depth / 2;
min_dist_to_wall_old =
min(
minimum_distance(A, D, nick.entity.pos),
min(
minimum_distance(C, D, nick.entity.pos),
min(
minimum_distance(A, B, nick.entity.pos),
minimum_distance(B, C, nick.entity.pos)
)));
min_dist_to_wall_new =
min(
minimum_distance(A, D, new_pos),
min(
minimum_distance(C, D, new_pos),
min(
minimum_distance(A, B, new_pos),
minimum_distance(B, C, new_pos)
)));
if (pt_in_rect(new_pos, &scenery[SCENERY_COUNT - 1].entity, get_static_entity_width(shack), get_static_entity_depth(shack))
) {
if (min_dist_to_wall_new != min_dist_to_wall_old) {
nick.entity.speed = 0;
}
}
}
if ( distance(nick.entity.pos, willy.entity.pos) < 150) {
nick.entity.speed = -800;
set_entity_state(&nick, FALLBACK);
}