// Copyright (C) 2022 RozK
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

#include "render.hpp"

rk_vec3 rk_view_origin;
rk_vec3 rk_view_lookat;
rk_mat4 rk_view;
rk_mat4 rk_view_km;

float rk_projection_hfov;
float rk_projection_ratio;
float rk_projection_near;
float rk_projection_far;
rk_mat4 rk_projection;

void rk_set_projection(
    float hfov,
    float ratio,
    float near,
    float far) {
    rk_projection_hfov = hfov;
    rk_projection_ratio = ratio;
    rk_projection_near = near;
    rk_projection_far = far;
    rk_projection = glm::perspectiveRH(hfov, ratio, near, far);
}

extern void rk_set_view(
    rk_vec3 const & position,
    rk_vec3 const & lookat) {
    rk_view_origin = position;
    rk_view_lookat = lookat;
    rk_view = glm::lookAtRH(position, lookat, glm::vec3(0.0f, 0.0f, 1.0f));
    rk_view_km = glm::lookAtRH(position * 0.001f, lookat * 0.001f, glm::vec3(0.0f, 0.0f, 1.0f));
}