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stageutils: add camera3d_project

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This commit is contained in:
Andrei Alexeyev 2023-05-14 17:38:21 +02:00
parent a6c9303350
commit 907eb8ff4e
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GPG key ID: 72D26128040B9690
2 changed files with 16 additions and 3 deletions
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18
src/stageutils.c
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@ -39,10 +39,14 @@ void stage3d_update(Stage3D *s) {
camera3d_update(&s->cam);
}
void camera3d_apply_transforms(Camera3D *cam, mat4 mat) {
static void camera3d_apply_rotations(Camera3D *cam, mat4 mat) {
glm_rotate_x(mat, glm_rad(-cam->rot.pitch), mat);
glm_rotate_y(mat, glm_rad(-cam->rot.yaw), mat);
glm_rotate_z(mat, glm_rad(-cam->rot.roll), mat);
}
void camera3d_apply_transforms(Camera3D *cam, mat4 mat) {
camera3d_apply_rotations(cam, mat);
vec3 trans;
glm_vec3_negate_to(cam->pos, trans);
@ -89,13 +93,21 @@ void camera3d_unprojected_ray(Camera3D *cam, cmplx pos, vec3 dest) {
mat4 mpersp;
glm_perspective(cam->fovy, cam->aspect, cam->near, cam->far, mpersp);
camera3d_apply_transforms(cam, mpersp);
glm_translate(mpersp, cam->pos);
camera3d_apply_rotations(cam, mpersp);
glm_unproject(p, mpersp, viewport, dest);
glm_vec3_normalize(dest);
}
void camera3d_project(Camera3D *cam, vec3 pos, vec3 dest) {
vec4 viewport = {0, VIEWPORT_H, VIEWPORT_W, -VIEWPORT_H};
mat4 mpersp;
glm_perspective(cam->fovy, cam->aspect, cam->near, cam->far, mpersp);
camera3d_apply_rotations(cam, mpersp);
glm_project(pos, mpersp, viewport, dest);
}
void camera3d_fill_point_light_uniform_vectors(
Camera3D *cam,

1
src/stageutils.h
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@ -96,6 +96,7 @@ void camera3d_update(Camera3D *cam) attr_nonnull(1);
void camera3d_apply_transforms(Camera3D *cam, mat4 mat) attr_nonnull(1, 2);
void camera3d_apply_inverse_transforms(Camera3D *cam, mat4 mat) attr_nonnull(1, 2);
void camera3d_unprojected_ray(Camera3D *cam, cmplx pos, vec3 dest) attr_nonnull(1, 3);
void camera3d_project(Camera3D *cam, vec3 pos, vec3 dest) attr_nonnull(1, 2, 3);
void camera3d_set_point_light_uniforms(
Camera3D *cam,