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efl/src/examples/evas/evas-3d-frustum.c

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/*
* This example shows how to work frustum culling.
* Use keys Up/Down for moving far plane of frustum.
* Use keys Left/Right for changing camera view.
* See in terminal output value of z coordinate of far plane of frustum
* and check OBB's points inside frustum.
* @see evas_3d_node_obb_frustum_check.
* Compile with "gcc -o evas-3d-frustum evas-3d-frustum.c `pkg-config --libs --cflags efl evas ecore ecore-evas eo`"
*/
#define EFL_EO_API_SUPPORT
#define EFL_BETA_API_SUPPORT
#include <Ecore.h>
#include <Ecore_Evas.h>
#include <Evas.h>
#include <Eo.h>
#define WIDTH 800
#define HEIGHT 600
typedef struct _Scene_Data
{
Eo *root_node;
Eo *camera_node;
Eo *light_node;
Eo *mesh_node_model;
Eo *scene;
Eo *camera;
Eo *light;
Eo *mesh_model;
Eo *material_model;
Eo *texture_model;
} Scene_Data;
Evas *evas;
Evas_Object *background,*image;
Evas_Real fleft = -5, fright = 5, fbottom = -5, fup = 5, fnear = 20, ffar = 40;
static void
_on_delete(Ecore_Evas *ee EINA_UNUSED)
{
ecore_main_loop_quit();
}
static void
_on_canvas_resize(Ecore_Evas *ee)
{
int w, h;
ecore_evas_geometry_get(ee, NULL, NULL, &w, &h);
evas_object_resize(background, w, h);
evas_object_resize(image, w, h);
evas_object_move(image, 0, 0);
}
static void
_on_key_down(void *data, Evas *e EINA_UNUSED, Evas_Object *eo EINA_UNUSED, void *event_info)
{
Scene_Data *scene = (Scene_Data *)data;
Evas_Event_Key_Down *ev = event_info;
int frustum;
if (!strcmp("Up", ev->key))
{
ffar += 5;
eo_do(scene->camera, evas_3d_camera_projection_frustum_set(fleft, fright, fbottom, fup, fnear, ffar));
eo_do(scene->mesh_node_model,
frustum = evas_3d_node_obb_frustum_check(scene->camera_node));
fprintf(stdout, "far - %f frustum - %d \n", ffar, frustum);
}
else if(!strcmp("Down", ev->key))
{
ffar -= 5;
eo_do(scene->camera, evas_3d_camera_projection_frustum_set(fleft, fright, fbottom, fup, fnear, ffar));
eo_do(scene->mesh_node_model,
frustum = evas_3d_node_obb_frustum_check(scene->camera_node));
fprintf(stdout, "far - %f frustum - %d \n", ffar, frustum);
}
else if(!strcmp("Return", ev->key))
{
eo_do(scene->mesh_node_model,
frustum = evas_3d_node_obb_frustum_check(scene->camera_node));
fprintf(stdout, "far - %f frustum - %d \n", ffar, frustum);
}
else if (!strcmp("Left", ev->key))
{
eo_do(scene->camera_node, evas_3d_node_position_set(50.0, 0.0, 0.0),
evas_3d_node_look_at_set(EVAS_3D_SPACE_PARENT, 0.0, 0.0, 0.0, EVAS_3D_SPACE_PARENT, 0.0, 0.0, 1.0));
fprintf(stdout, "Changed position and view of camera\n");
}
else if (!strcmp("Right", ev->key))
{
eo_do(scene->camera_node, evas_3d_node_position_set(0.0, 0.0, 50.0);
evas_3d_node_look_at_set(EVAS_3D_SPACE_PARENT, 0.0, 0.0, 0.0, EVAS_3D_SPACE_PARENT, 0.0, -1.0, 0.0));
fprintf(stdout, "Changed position and view of camera\n");
}
else
fprintf(stdout, "Press Right/Left/Up/Bottom keys\n");
}
static Eina_Bool
_animate_scene_model(void *data)
{
static int frame = 0;
Scene_Data *scene = (Scene_Data *)data;
eo_do(scene->mesh_node_model,
evas_3d_node_mesh_frame_set(scene->mesh_model, frame),
evas_3d_node_orientation_angle_axis_set(90, 1.0, 0.0, 0.0));
frame += 20;
if (frame > 256 * 18) frame = 0;
return ECORE_CALLBACK_RENEW;
}
static void
_camera_setup(Scene_Data *data)
{
data->camera = eo_add(EVAS_3D_CAMERA_CLASS, evas);
data->camera_node = eo_add(EVAS_3D_NODE_CLASS, evas,
evas_3d_node_constructor(EVAS_3D_NODE_TYPE_CAMERA));
eo_do(data->camera_node,
evas_3d_node_camera_set(data->camera),
evas_3d_node_position_set(0.0, 0.0, 50.0);
evas_3d_node_look_at_set(EVAS_3D_SPACE_PARENT, 0.0, 0.0, 0.0, EVAS_3D_SPACE_PARENT, 0.0, -1.0, 0.0));
eo_do(data->root_node, evas_3d_node_member_add(data->camera_node));
}
static void
_light_setup(Scene_Data *data)
{
data->light = eo_add(EVAS_3D_LIGHT_CLASS, evas);
eo_do(data->light,
evas_3d_light_ambient_set( 0.2, 0.2, 0.2, 1.0);
evas_3d_light_diffuse_set(1.0, 1.0, 1.0, 1.0);
evas_3d_light_specular_set(1.0, 1.0, 1.0, 1.0));
data->light_node = eo_add(EVAS_3D_NODE_CLASS,evas,
evas_3d_node_constructor(EVAS_3D_NODE_TYPE_LIGHT));
eo_do(data->light_node,
evas_3d_node_light_set(data->light),
evas_3d_node_position_set(0.0, 0.0, 0.0),
evas_3d_node_look_at_set(EVAS_3D_SPACE_PARENT, 0.0, 0.0, 0.0, EVAS_3D_SPACE_PARENT, 0.0, 1.0, 0.0));
eo_do(data->root_node, evas_3d_node_member_add(data->light_node));
}
static void
_mesh_setup_model(Scene_Data *data)
{
data->mesh_model = eo_add(EVAS_3D_MESH_CLASS, evas);
data->material_model = eo_add(EVAS_3D_MATERIAL_CLASS, evas);
data->texture_model = eo_add(EVAS_3D_TEXTURE_CLASS, evas);
eo_do(data->texture_model,
evas_3d_texture_file_set("eagle.png", NULL),
evas_3d_texture_filter_set(EVAS_3D_TEXTURE_FILTER_NEAREST, EVAS_3D_TEXTURE_FILTER_NEAREST),
evas_3d_texture_wrap_set(EVAS_3D_WRAP_MODE_REPEAT, EVAS_3D_WRAP_MODE_REPEAT));
eo_do(data->material_model,
evas_3d_material_enable_set(EVAS_3D_MATERIAL_NORMAL, EINA_TRUE),
evas_3d_material_enable_set(EVAS_3D_MATERIAL_AMBIENT, EINA_TRUE),
evas_3d_material_enable_set(EVAS_3D_MATERIAL_DIFFUSE, EINA_TRUE),
evas_3d_material_enable_set(EVAS_3D_MATERIAL_SPECULAR, EINA_TRUE);
evas_3d_material_enable_set(EVAS_3D_MATERIAL_NORMAL, EINA_TRUE),
evas_3d_material_color_set(EVAS_3D_MATERIAL_AMBIENT, 0.01, 0.01, 0.01, 1.0),
evas_3d_material_color_set(EVAS_3D_MATERIAL_DIFFUSE, 1.0, 1.0, 1.0, 1.0),
evas_3d_material_color_set(EVAS_3D_MATERIAL_SPECULAR, 1.0, 1.0, 1.0, 1.0),
evas_3d_material_texture_set( EVAS_3D_MATERIAL_DIFFUSE, data->texture_model),
evas_3d_material_shininess_set(100.0));
eo_do(data->mesh_model,
efl_file_set("eagle.md2", NULL),
evas_3d_mesh_frame_material_set(0, data->material_model),
evas_3d_mesh_shade_mode_set(EVAS_3D_SHADE_MODE_DIFFUSE));
}
static void
_scene_setup(Scene_Data *data)
{
data->scene = eo_add(EVAS_3D_SCENE_CLASS, evas);
data->root_node = eo_add(EVAS_3D_NODE_CLASS, evas,
evas_3d_node_constructor(EVAS_3D_NODE_TYPE_NODE));
_camera_setup(data);
_light_setup(data);
_mesh_setup_model(data);
data->mesh_node_model = eo_add(EVAS_3D_NODE_CLASS, evas,
evas_3d_node_constructor(EVAS_3D_NODE_TYPE_MESH));
eo_do(data->mesh_node_model,
evas_3d_node_position_set(0, 0, 0);
evas_3d_node_scale_set(0.3, 0.3, 0.3),
evas_3d_node_orientation_angle_axis_set(90, 1.0, 1.0, 0.0));
eo_do(data->root_node, evas_3d_node_member_add(data->mesh_node_model));
eo_do(data->mesh_node_model, evas_3d_node_mesh_add(data->mesh_model));
eo_do(data->scene,
evas_3d_scene_size_set( WIDTH, HEIGHT),
evas_3d_scene_background_color_set(0.5, 0.5, 0.5, 0.0),
evas_3d_scene_root_node_set(data->root_node);
evas_3d_scene_camera_node_set(data->camera_node));
}
int
main(void)
{
Scene_Data data;
Ecore_Evas *ecore_evas;
if (!ecore_evas_init()) return 0;
setenv("ECORE_EVAS_ENGINE", "opengl_x11", 1);
ecore_evas = ecore_evas_new(NULL, 0, 0, WIDTH, HEIGHT, NULL);
if (!ecore_evas) return 0;
ecore_evas_callback_delete_request_set(ecore_evas, _on_delete);
ecore_evas_callback_resize_set(ecore_evas, _on_canvas_resize);
ecore_evas_show(ecore_evas);
evas = ecore_evas_get(ecore_evas);
_scene_setup(&data);
background = evas_object_rectangle_add(evas);
evas_object_color_set(background, 0, 0, 0, 255);
evas_object_move(background, 0, 0);
evas_object_resize(background, WIDTH, HEIGHT);
evas_object_show(background);
image = evas_object_image_filled_add(evas);
evas_object_move(image, 0, 0);
evas_object_resize(image, WIDTH, HEIGHT);
evas_object_show(image);
evas_object_focus_set(image, EINA_TRUE);
eo_do(image, evas_obj_image_scene_set(data.scene));
ecore_timer_add(0.1, _animate_scene_model, &data);
evas_object_event_callback_add(image, EVAS_CALLBACK_KEY_DOWN, _on_key_down, &data);
ecore_main_loop_begin();
ecore_evas_free(ecore_evas);
ecore_evas_shutdown();
return 0;
}
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