static int tool_laser_iter(goxel_t *goxel, const inputs_t *inputs, int state,
const vec2_t *view_size, bool inside)
{
vec3_t pos, normal;
box_t box;
painter_t painter = goxel->painter;
mesh_t *mesh = goxel->image->active_layer->mesh;
const bool down = inputs->mouse_down[0];
// XXX: would be nice if we got the vec4_t view instead of view_size,
// and why input->pos is not already in win pos?
vec4_t view = vec4(0, 0, view_size->x, view_size->y);
vec2_t win = inputs->mouse_pos;
win.y = view_size->y - win.y;
painter.op = OP_SUB;
painter.shape = &shape_cylinder;
// Create the tool box from the camera along the visible ray.
camera_get_ray(&goxel->camera, &win, &view, &pos, &normal);
box.mat = mat4_identity;
box.w = mat4_mul_vec(mat4_inverted(goxel->camera.view_mat),
vec4(1, 0, 0, 0)).xyz;
box.h = mat4_mul_vec(mat4_inverted(goxel->camera.view_mat),
vec4(0, 1, 0, 0)).xyz;
box.d = mat4_mul_vec(mat4_inverted(goxel->camera.view_mat),
vec4(0, 0, 1, 0)).xyz;
box.d = vec3_neg(normal);
box.p = pos;
// Just a large value for the size of the laser box.
mat4_itranslate(&box.mat, 0, 0, -1024);
mat4_iscale(&box.mat, goxel->tool_radius, goxel->tool_radius, 1024);
render_box(&goxel->rend, &box, false, NULL, false);
if (state == STATE_IDLE) {
if (down) {
state = STATE_PAINT;
image_history_push(goxel->image);
}
}
if (state == STATE_PAINT) {
if (!down) {
return STATE_IDLE;
}
mesh_op(mesh, &painter, &box);
goxel_update_meshes(goxel, -1);
}
return state;
}
// Get the raytracing ray of the camera at a given screen position.
void camera_get_ray(const camera_t *camera, const vec2_t *win,
const vec4_t *view, vec3_t *o, vec3_t *d)
{
// XXX: ugly algo.
mat4_t inv;
vec3_t p;
vec3_t norm_pos = vec3((2 * win->x - view->v[0]) / view->v[2] - 1,
(2 * win->y - view->v[1]) / view->v[3] - 1,
- 1);
if (camera->ortho) {
inv = mat4_inverted(mat4_mul(camera->proj_mat, camera->view_mat));
*o = mat4_mul_vec(inv, vec4(norm_pos.x, norm_pos.y, 0, 1)).xyz;
*d = mat4_mul_vec(inv, vec4(0, 0, -1, 0)).xyz;
} else {
inv = mat4_inverted(camera->view_mat);
*o = mat4_mul_vec(inv, vec4(0, 0, 0, 1)).xyz;
inv = mat4_mul(camera->proj_mat, camera->view_mat);
mat4_invert(&inv);
p = mat4_mul_vec3(inv, norm_pos);
*d = vec3_sub(p, *o);
}
}
static int tool_laser_iter(goxel_t *goxel, const inputs_t *inputs, int state,
const vec2_t *view_size, bool inside)
{
vec3_t pos, normal;
box_t box;
painter_t painter = goxel->painter;
mesh_t *mesh = goxel->image->active_layer->mesh;
const bool down = inputs->mouse_down[0];
painter.op = OP_SUB;
painter.shape = &shape_cylinder;
// Create the laser box with an inifinity width.
goxel_unproject_on_screen(goxel, view_size, &inputs->mouse_pos,
&pos, &normal);
box.mat = mat4_identity;
box.w = mat4_mul_vec(mat4_inverted(goxel->camera.view_mat),
vec4(1, 0, 0, 0)).xyz;
box.h = mat4_mul_vec(mat4_inverted(goxel->camera.view_mat),
vec4(0, 1, 0, 0)).xyz;
box.d = mat4_mul_vec(mat4_inverted(goxel->camera.view_mat),
vec4(0, 0, 1, 0)).xyz;
box.p = pos;
mat4_itranslate(&box.mat, 0, 0, -128);
mat4_iscale(&box.mat, goxel->tool_radius, goxel->tool_radius, 128);
render_box(&goxel->rend, &box, false, NULL, false);
if (state == STATE_IDLE) {
if (down) state = STATE_PAINT;
}
if (state == STATE_PAINT) {
if (!down) {
image_history_push(goxel->image);
return STATE_IDLE;
}
mesh_op(mesh, &painter, &box);
goxel_update_meshes(goxel, false);
}
return state;
}
