prosperon/source/engine/gameobject.c

#include "gameobject.h"

#include "shader.h"
#include "sprite.h"
#include "registry.h"
#include "2dphysics.h"
#include "script.h"
#include "input.h"
#include <string.h>
#include <chipmunk/chipmunk.h>
#include "resources.h"
#include "nuke.h"

#include "stb_ds.h"

struct mGameObject *gameobjects = NULL;

const int nameBuf[MAXNAME] = { 0 };
const int prefabNameBuf[MAXNAME] = { 0 };

struct mGameObject *get_gameobject_from_id(int id)
{
    return &gameobjects[id];
}

static void gameobject_setpickcolor(struct mGameObject *go)
{
    float r = ((go->editor.id & 0x000000FF) >> 0) / 255.f;
    float g = ((go->editor.id & 0x0000FF00) >> 8) / 255.f;
    float b = ((go->editor.id & 0x00FF0000) >> 16) / 255.f;

    go->editor.color[0] = r;
    go->editor.color[1] = g;
    go->editor.color[2] = b;
}

struct mGameObject *MakeGameobject()
{
    printf("Making gameobject\n");
    struct mGameObject go = {
        .editor.id = arrlen(gameobjects),
        .transform.scale = 1.f,
        .scale = 1.f,
        .bodytype = CP_BODY_TYPE_STATIC,
        .mass = 1.f
    };

    gameobject_setpickcolor(&go);
    strncpy(go.editor.mname, "New object", MAXNAME);
    go.body =  cpSpaceAddBody(space, cpBodyNew(go.mass, 1.f));

    arrput(gameobjects, go);

    return &arrlast(gameobjects);
}

void gameobject_addcomponent(struct mGameObject *go, struct component *c)
{
    arrput(go->components, *c);
    struct component *newc = &arrlast(go->components);
    newc->go = go;
    newc->data = newc->make(newc->go);
}

void gameobject_delete(int id)
{
    struct mGameObject *go = &gameobjects[id];
    for (int i = 0; i < arrlen(go->components); i++) {
        free(go->components[i].data);
    }

    arrfree(go->components);

    arrdelswap(gameobjects, id);
}

void gameobject_delcomponent(struct mGameObject *go, int n)
{
    go->components[n].delete(go->components[n].data);
    arrdel(go->components, n);
}

void setup_model_transform(struct mTransform *t, struct mShader *s, float scale)
{
    mfloat_t modelT[16] = { 0.f };
    mfloat_t matbuff[16] = { 0.f };
    memcpy(modelT, UNITMAT4, sizeof(modelT));
    mat4_translate_vec3(modelT, t->position);
    mat4_multiply(modelT, modelT, mat4_rotation_quat(matbuff, t->rotation));
    mat4_scale_vec3f(modelT, scale);
    shader_setmat4(s, "model", modelT);

}

void gameobject_save(struct mGameObject *go, FILE * file)
{
    fwrite(go, sizeof(*go), 1, file);

    printf("Number of components is %d.\n", arrlen(go->components));

    int n = arrlen(go->components);
    fwrite(&n, sizeof(n), 1, file);
    for (int i = 0; i < n; i++) {
        fwrite(&go->components[i].id, sizeof(int), 1, file);

        if (go->components[i].io == NULL)
            fwrite(go->components[i].data, go->components[i].datasize, 1, file);
        else
            go->components[i].io(go->components[i].data, file, 0);
    }
}

void gameobject_makefromprefab(char *path)
{
    FILE *fprefab = fopen(path, "rb");
    if (fprefab == NULL) {
	return;
    }

    struct mGameObject *new = MakeGameobject();
    fread(new, sizeof(*new), 1, fprefab);
    new->components = NULL;

    gameobject_init(new, fprefab);

    fclose(fprefab);
}

void gameobject_init(struct mGameObject *go, FILE * fprefab)
{
    go->body = cpSpaceAddBody(space, cpBodyNew(go->mass, 1.f));

    int comp_n;
    fread(&comp_n, sizeof(int), 1, fprefab);
    arrsetlen(go->components, comp_n);
    int n;

    for (int i = 0; i < comp_n; i++) {
        fread(&n, sizeof(int), 1, fprefab);
        go->components[i] = components[n];
        struct component *newc = &go->components[i];
        newc->go = go;
        newc->data = malloc(newc->datasize);

        if (newc->io == NULL)
            fread(newc->data, newc->datasize, 1, fprefab);
        else
            newc->io(newc->data, fprefab, 1);

        newc->init(newc->data, go);
    }
}

void gameobject_saveprefab(struct mGameObject *go)
{
    char prefabfname[60] = { '\0' };
    strncat(prefabfname, go->editor.prefabName, MAXNAME);
    strncat(prefabfname, EXT_PREFAB, 10);
    FILE *pfile = fopen(prefabfname, "wb+");
    gameobject_save(go, pfile);
    fclose(pfile);

    findPrefabs();
}





void gameobject_syncprefabs(char *revertPath)
{
/*
   struct mGameObject **go = objects;
   int i = 0;
   while(i != nobjects) {
   	if ((*go)->editor.curPrefabPath && !strcmp((*go)->editor.curPrefabPath, revertPath)) { ; }//objectRevertPrefab(go); //TODO: revertprefab
   }
*/
}

void gameobject_revertprefab(struct mGameObject *go)
{

}

void toggleprefab(struct mGameObject *go)
{
    go->editor.prefabSync = !go->editor.prefabSync;

    if (go->editor.prefabSync) {
	strcpy(go->editor.prefabName, go->editor.rootPrefabName);
	gameobject_revertprefab(go);	//TODO: object revert prefab
    } else {
	go->editor.prefabName[0] = '\0';
    }
}

void gameobject_update(struct mGameObject *go)
{
    if (go->script)
	script_run(go->script);
}

void gameobject_move(struct mGameObject *go, float xs, float ys)
{
    cpVect p = cpBodyGetPosition(go->body);
    p.x += xs * deltaT;
    p.y += ys * deltaT;
    cpBodySetPosition(go->body, p);
}

void gameobject_rotate(struct mGameObject *go, float as)
{
    cpFloat a = cpBodyGetAngle(go->body);
    a += as * deltaT;
    cpBodySetAngle(go->body, a);
}

void update_gameobjects() {
    for (int i = 0; i < arrlen(gameobjects); i++)
        gameobject_update(&gameobjects[i]);
}


void object_gui(struct mGameObject *go)
{
    float temp_pos[2];
    temp_pos[0] = cpBodyGetPosition(go->body).x;
    temp_pos[1] = cpBodyGetPosition(go->body).y;

    draw_point(temp_pos[0], temp_pos[1], 3);

    nk_property_float2(ctx, "Position", -1000000.f, temp_pos, 1000000.f, 1.f, 0.5f);

    cpVect tvect = { temp_pos[0], temp_pos[1] };
    cpBodySetPosition(go->body, tvect);

    float mtry = cpBodyGetAngle(go->body);
    float modtry = fmodf(mtry * RAD2DEGS, 360.f);
    if (modtry < 0.f)
      modtry += 360.f;

    float modtry2 = modtry;
    nk_property_float(ctx, "Angle", -1000.f, &modtry, 1000.f, 0.5f, 0.5f);
    modtry -= modtry2;
    cpBodySetAngle(go->body, mtry + (modtry * DEG2RADS));

    nk_property_float(ctx, "Scale", 0.f, &go->scale, 1000.f, 0.01f, go->scale * 0.01f);

    nk_layout_row_dynamic(ctx, 25, 3);
    nk_radio_button_label(ctx, "Static", &go->bodytype, CP_BODY_TYPE_STATIC);
    nk_radio_button_label(ctx, "Dynamic", &go->bodytype, CP_BODY_TYPE_DYNAMIC);
    nk_radio_button_label(ctx, "Kinematic", &go->bodytype, CP_BODY_TYPE_KINEMATIC);

    cpBodySetType(go->body, go->bodytype);

    if (go->bodytype == CP_BODY_TYPE_DYNAMIC) {
         nk_property_float(ctx, "Mass", 0.01f, &go->mass, 1000.f, 0.01f, 0.01f);
	cpBodySetMass(go->body, go->mass);
    }

    nk_property_float(ctx, "Friction", 0.f, &go->f, 10.f, 0.01f, 0.01f);
    nk_property_float(ctx, "Elasticity", 0.f, &go->e, 2.f, 0.01f, 0.01f);

    int n = -1;



    for (int i = 0; i < arrlen(go->components); i++) {
	struct component *c = &go->components[i];

	if (c->draw_debug)
	    c->draw_debug(c->data);


 nuke_nel(5);
     if (nk_button_label(ctx, "Del")) n = i;
	if (nk_tree_push_id(ctx, NK_TREE_NODE, c->name, NK_MINIMIZED, i)) {

	    c->draw_gui(c->data);

	    nk_tree_pop(ctx);
	}


    }

    if (n >= 0)
	gameobject_delcomponent(go, n);

}