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/**
* Example of picking nodes and meshes by screen coordinates using Evas-3D.
*
* Here shown which transformation should be applied to event_info of
* _on_mouse_down to make them usable in evas_canvas3d_scene_pick()
* and parameters which can be got from this function.
*
* @verbatim
* gcc -o evas-3d-pick evas-3d-pick.c `pkg-config --libs --cflags efl evas ecore ecore-evas eo` -lm
* @endverbatim
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#else
#define PACKAGE_EXAMPLES_DIR "."
#define EFL_BETA_API_SUPPORT
#endif
#include <math.h>
#include <Eo.h>
#include <Evas.h>
#include <Ecore.h>
#include <Ecore_Evas.h>
#include "evas-common.h"
#define WIDTH 400
#define HEIGHT 400
static const char *image_path = PACKAGE_EXAMPLES_DIR EVAS_IMAGE_FOLDER "/wood.jpg";
static Ecore_Evas *ecore_evas = NULL;
static Evas *evas = NULL;
static Eo *background = NULL;
static Eo *image = NULL;
static Eo *scene = NULL;
static Eo *root_node = NULL;
static Eo *camera_node = NULL;
static Eo *camera = NULL;
static Eo *mesh_node = NULL;
static Eo *mesh = NULL;
static Eo *material = NULL;
static Eo *texture_diffuse = NULL;
static Eo *sphere = NULL;
static Eina_Bool
_animate_scene(void *data)
{
static float angle = 0.0f;
angle += 0.3;
evas_canvas3d_node_orientation_angle_axis_set((Evas_Canvas3D_Node *)data, angle, 0.0, 1.0, 0.0);
/* Rotate */
if (angle > 360.0) angle -= 360.0f;
return EINA_TRUE;
}
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_mouse_down(void *data EINA_UNUSED, Evas *e EINA_UNUSED, Evas_Object *obj EINA_UNUSED,
void *event_info)
{
Evas_Event_Mouse_Down *ev = event_info;
Evas_Real s, t;
Evas_Canvas3D_Node *n;
Evas_Canvas3D_Mesh *m;
Eina_Bool pick;
pick = evas_canvas3d_scene_pick(scene, ev->canvas.x, ev->canvas.y, &n, &m, &s, &t);
if (pick) printf("Picked : ");
else printf("Not picked : ");
printf("output(%d, %d) canvas(%d, %d) texcoord(%f, %f) "
"node(%p) mesh(%p)\n",
ev->output.x, ev->output.y,
ev->canvas.x, ev->canvas.y,
s, t, n, m);
}
int
main(void)
{
// Unless Evas 3D supports Software renderer, we force use of the gl backend.
putenv("ECORE_EVAS_ENGINE=opengl_x11");
if (!ecore_evas_init()) return 0;
ecore_evas = ecore_evas_new(NULL, 10, 10, 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);
/* Add a scene object .*/
scene = efl_add(EVAS_CANVAS3D_SCENE_CLASS, evas);
/* Add the root node for the scene. */
root_node = efl_add(EVAS_CANVAS3D_NODE_CLASS, evas, evas_canvas3d_node_type_set(efl_added, EVAS_CANVAS3D_NODE_TYPE_NODE));
/* Add the camera. */
camera = efl_add(EVAS_CANVAS3D_CAMERA_CLASS, evas);
evas_canvas3d_camera_projection_perspective_set(camera, 30.0, 1.0, 1.0, 100.0);
camera_node =
efl_add(EVAS_CANVAS3D_NODE_CLASS, evas, evas_canvas3d_node_type_set(efl_added, EVAS_CANVAS3D_NODE_TYPE_CAMERA));
evas_canvas3d_node_camera_set(camera_node, camera);
evas_canvas3d_node_position_set(camera_node, 0.0, 0.0, 2.5);
evas_canvas3d_node_look_at_set(camera_node, EVAS_CANVAS3D_SPACE_PARENT, 0.0, 0.0, 0.0, EVAS_CANVAS3D_SPACE_PARENT, 0.0, 1.0, 0.0);
evas_canvas3d_node_member_add(root_node, camera_node);
sphere = efl_add(EVAS_CANVAS3D_PRIMITIVE_CLASS, evas);
evas_canvas3d_primitive_form_set(sphere, EVAS_CANVAS3D_MESH_PRIMITIVE_SPHERE);
evas_canvas3d_primitive_precision_set(sphere, 50);
mesh = efl_add(EVAS_CANVAS3D_MESH_CLASS, evas);
evas_canvas3d_mesh_from_primitive_set(mesh, 0, sphere);
material = efl_add(EVAS_CANVAS3D_MATERIAL_CLASS, evas);
texture_diffuse = efl_add(EVAS_CANVAS3D_TEXTURE_CLASS, evas);
efl_file_simple_load(texture_diffuse, image_path, NULL);
evas_canvas3d_texture_filter_set(texture_diffuse, EVAS_CANVAS3D_TEXTURE_FILTER_LINEAR, EVAS_CANVAS3D_TEXTURE_FILTER_LINEAR);
evas_canvas3d_material_texture_set(material, EVAS_CANVAS3D_MATERIAL_ATTRIB_DIFFUSE, texture_diffuse);
evas_canvas3d_material_enable_set(material, EVAS_CANVAS3D_MATERIAL_ATTRIB_AMBIENT, EINA_TRUE);
evas_canvas3d_material_enable_set(material, EVAS_CANVAS3D_MATERIAL_ATTRIB_DIFFUSE, EINA_TRUE);
evas_canvas3d_material_enable_set(material, EVAS_CANVAS3D_MATERIAL_ATTRIB_SPECULAR, EINA_TRUE);
evas_canvas3d_material_color_set(material, EVAS_CANVAS3D_MATERIAL_ATTRIB_AMBIENT, 0.01, 0.01, 0.01, 1.0);
evas_canvas3d_material_color_set(material, EVAS_CANVAS3D_MATERIAL_ATTRIB_DIFFUSE, 1.0, 1.0, 1.0, 1.0);
evas_canvas3d_material_color_set(material, EVAS_CANVAS3D_MATERIAL_ATTRIB_SPECULAR, 1.0, 1.0, 1.0, 1.0);
evas_canvas3d_material_shininess_set(material, 50.0);
mesh_node = efl_add(EVAS_CANVAS3D_NODE_CLASS, evas, evas_canvas3d_node_type_set(efl_added, EVAS_CANVAS3D_NODE_TYPE_MESH));
evas_canvas3d_node_member_add(root_node, mesh_node);
evas_canvas3d_node_mesh_add(mesh_node, mesh);
evas_canvas3d_mesh_shader_mode_set(mesh, EVAS_CANVAS3D_SHADER_MODE_DIFFUSE);
evas_canvas3d_mesh_frame_material_set(mesh, 0, material);
/* Set up scene. */
evas_canvas3d_scene_root_node_set(scene, root_node);
evas_canvas3d_scene_camera_node_set(scene, camera_node);
evas_canvas3d_scene_size_set(scene, WIDTH, HEIGHT);
/* Add evas objects. */
background = efl_add(EFL_CANVAS_RECTANGLE_CLASS, evas);
efl_gfx_color_set(background, 0, 0, 0, 255);
efl_gfx_entity_size_set(background, EINA_SIZE2D(WIDTH, HEIGHT));
efl_gfx_entity_visible_set(background, EINA_TRUE);
image = efl_add(EFL_CANVAS_SCENE3D_CLASS, evas);
efl_canvas_scene3d_set(image, scene);
efl_gfx_entity_size_set(image, EINA_SIZE2D(WIDTH, HEIGHT));
efl_gfx_entity_visible_set(image, EINA_TRUE);
evas_object_event_callback_add(image, EVAS_CALLBACK_MOUSE_DOWN,
_on_mouse_down, NULL);
ecore_timer_add(0.01, _animate_scene, mesh_node);
ecore_main_loop_begin();
ecore_evas_free(ecore_evas);
ecore_evas_shutdown();
return 0;
}
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