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/apps/tools/twndel: add reference lines

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This commit is contained in:
veclavtalica 2025-03-09 06:53:54 +03:00
parent e11e63f273
commit cd3033f9c4
2 changed files with 40 additions and 4 deletions
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4
apps/tools/twndel/state.h
View File

@ -20,6 +20,10 @@
#define CAMERA_ROTATION_SPEED 0.04f
#define SELECTION_SPHERE_RADIUS 32
/* should be an odd number */
#define SNAP_LINES_SHOW 7
#define SNAP_LINES_WIDTH 1.0f
#define SNAP_LINES_COLOR ((Color){200,200,200,150})
typedef struct Operation {
enum {

40
apps/tools/twndel/tool.c
View File

@ -242,6 +242,39 @@ static bool vector_plane_intersection(Vec3 o, Vec3 v, Vec3 p, Vec3 n, Vec3 *out)
}
static void show_snap_lines(Vec3 p) {
float step = 1.0f / ((float)POINTS_PER_METER / state.grid_snap_granularity);
int const lines_per_side = (SNAP_LINES_SHOW - 1) / 2;
for (int l = -lines_per_side; l <= lines_per_side; ++l) {
if (!state.axis_mask[0]) {
Vec3 c = vec3_add(p, vec3_scale((Vec3){1,0,0}, step * (float)l));
draw_line_3d(
vec3_add(c, vec3_scale((Vec3){0,0,1}, SNAP_LINES_WIDTH)),
vec3_add(c, vec3_scale((Vec3){0,0,1}, -SNAP_LINES_WIDTH)),
1,
SNAP_LINES_COLOR);
}
if (!state.axis_mask[1]) {
Vec3 axis = fabsf(vec3_dot(state.camera_direction, (Vec3){0,0,1})) >= 0.5f ? (Vec3){1,0,0} : (Vec3){0,0,1};
Vec3 c = vec3_add(p, vec3_scale((Vec3){0,1,0}, step * (float)l));
draw_line_3d(
vec3_add(c, vec3_scale(axis, SNAP_LINES_WIDTH)),
vec3_add(c, vec3_scale(axis, -SNAP_LINES_WIDTH)),
1,
SNAP_LINES_COLOR);
}
if (!state.axis_mask[2]) {
Vec3 c = vec3_add(p, vec3_scale((Vec3){0,0,1}, step * (float)l));
draw_line_3d(
vec3_add(c, vec3_scale((Vec3){1,0,0}, SNAP_LINES_WIDTH)),
vec3_add(c, vec3_scale((Vec3){1,0,0}, -SNAP_LINES_WIDTH)),
1,
SNAP_LINES_COLOR);
}
}
}
static void process_operation_move_point(Operation *op) {
/* finish dragging around */
/* TODO: dont keep empty ops on stack? */
@ -262,16 +295,15 @@ static void process_operation_move_point(Operation *op) {
Vec3 p = point_to_vec3(op->data.move_point.object, op->data.move_point.point);
bool point_moved = false;
/* TODO: show thresholds */
/* TODO: planes used should depend on looking angle */
/* for example, editing from the side makes better use of x/z facing planes */
/* figure out which planes are angled acutely against the viewing direction */
bool y_closer_than_horizon = fabsf(vec3_dot(state.camera_direction, (Vec3){0,1,0})) >= 0.5f;
Vec3 plane_normal_x = y_closer_than_horizon ? (Vec3){0,1,0} : (Vec3){0,0,1};
Vec3 plane_normal_z = y_closer_than_horizon ? (Vec3){0,1,0} : (Vec3){1,0,0};
/* show snapping in lines */
show_snap_lines(p);
Vec3 s;
if (!state.axis_mask[0]) {
if (vector_plane_intersection(cam.position, cam.direction, p, plane_normal_x, &s)) {