Differential D4379 Diff 17266 source/blender/editors/space_view3d/view3d_draw.c

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source/blender/editors/space_view3d/view3d_draw.c

Show First 20 Lines • Show All 853 Lines • ▼ Show 20 Lines	float ED_scene_grid_scale(Scene scene, const char *grid_unit)
return 1.0f;		return 1.0f;
}		}

float ED_view3d_grid_scale(Scene scene, View3D v3d, const char **grid_unit)		float ED_view3d_grid_scale(Scene scene, View3D v3d, const char **grid_unit)
{		{
return v3d->grid * ED_scene_grid_scale(scene, grid_unit);		return v3d->grid * ED_scene_grid_scale(scene, grid_unit);
}		}

		#define STEPS_LEN 8
		void ED_view3d_grid_steps(Scene *scene,
		View3D *v3d,
		RegionView3D *rv3d,
		float r_grid_steps[STEPS_LEN])
		{
		const void *usys;
		int i, len;
		bUnit_GetSystem(scene->unit.system, B_UNIT_LENGTH, &usys, &len);
		float grid_scale = v3d->grid;

		if (usys) {
		if (rv3d->view == RV3D_VIEW_USER) {
		/* Skip steps */
		len = bUnit_GetBaseUnit(usys) + 1;
		}

		grid_scale /= scene->unit.scale_length;

		for (i = 0; i < len; i++) {
		r_grid_steps[i] = (float)bUnit_GetScaler(usys, len - 1 - i) * grid_scale;
		}
		for (; i < STEPS_LEN; i++) {
		/* Fill last slots */
		r_grid_steps[i] = 10.0f * r_grid_steps[i - 1];
		}
		}
		else {
		if (rv3d->view != RV3D_VIEW_USER) {
		/* Allow 3 more subdivisions. */
		grid_scale /= powf(v3d->gridsubdiv, 3);
		}
		int subdiv = 1;
		for (i = 0;; i++) {
		r_grid_steps[i] = grid_scale * subdiv;

		if (i == STEPS_LEN - 1) {
		break;
		}
		subdiv *= v3d->gridsubdiv;
		}
		}
		}
		#undef STEPS_LEN

/* Simulates the grid scale that is actually viewed.		/* Simulates the grid scale that is actually viewed.
* The actual code is seen in `object_grid_frag.glsl` (see `grid_res`).		* The actual code is seen in `object_grid_frag.glsl` (see `grid_res`).
* Currently the simulation is only done when RV3D_VIEW_IS_AXIS. */		* Currently the simulation is only done when RV3D_VIEW_IS_AXIS. */
float ED_view3d_grid_view_scale(Scene *scene,		float ED_view3d_grid_view_scale(Scene *scene,
View3D *v3d,		View3D *v3d,
RegionView3D *rv3d,		RegionView3D *rv3d,
const char **grid_unit)		const char **grid_unit)
{		{
float grid_scale = ED_view3d_grid_scale(scene, v3d, grid_unit);		float grid_scale;
if (!rv3d->is_persp && RV3D_VIEW_IS_AXIS(rv3d->view)) {		if (!rv3d->is_persp && RV3D_VIEW_IS_AXIS(rv3d->view)) {
/* Decrease the distance between grid snap points depending on zoom. */		/* Decrease the distance between grid snap points depending on zoom. */
float grid_subdiv = v3d->gridsubdiv;		/* `0.38` was a value visually obtained in order to get a snap distance
if (grid_subdiv > 1) {		* that matches previous versions Blender.*/
/* Allow 3 more subdivisions (see OBJECT_engine_init). */		float min_dist = 0.38f * (rv3d->dist / v3d->lens);
grid_scale /= powf(grid_subdiv, 3);		float grid_steps[8];
		ED_view3d_grid_steps(scene, v3d, rv3d, grid_steps);
/* `3.0` was a value obtained by trial and error in order to get		for (int i = 0; i < ARRAY_SIZE(grid_steps); i++) {
* a nice snap distance.*/		grid_scale = grid_steps[i];
float grid_res = 3.0 * (rv3d->dist / v3d->lens);		if (grid_scale > min_dist) {
float lvl = (logf(grid_res / grid_scale) / logf(grid_subdiv));		break;

CLAMP_MIN(lvl, 0.0f);

grid_scale *= pow(grid_subdiv, (int)lvl);
}		}
}		}
		}
		else {
		grid_scale = ED_view3d_grid_scale(scene, v3d, grid_unit);
		}

return grid_scale;		return grid_scale;
}		}

static void draw_view_axis(RegionView3D rv3d, const rcti rect)		static void draw_view_axis(RegionView3D rv3d, const rcti rect)
{		{
const float k = U.rvisize * U.pixelsize; /* axis size */		const float k = U.rvisize * U.pixelsize; /* axis size */
/* axis alpha offset (rvibright has range 0-10) */		/* axis alpha offset (rvibright has range 0-10) */
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