EEVEE: Motion Blur: Add shutter position option
This makes it easier to generate motion trail effect with EEVEE. This just mimics the cycles option as described here: https://docs.blender.org/manual/en/latest/render/cycles/render_settings/motion_blur.html This fix T80070
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blender-bot
2023-02-13 21:24:49 +01:00
Referenced by issue #80070, Motion Blur Start position
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@ -173,7 +173,9 @@ class RENDER_PT_eevee_motion_blur(RenderButtonsPanel, Panel):
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layout.active = props.use_motion_blur
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col = layout.column()
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col.prop(props, "motion_blur_position", text="Position")
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col.prop(props, "motion_blur_shutter")
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col.separator()
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col.prop(props, "motion_blur_depth_scale")
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col.prop(props, "motion_blur_max")
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col.prop(props, "motion_blur_steps", text="Steps")
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@ -460,13 +460,27 @@ static void eevee_render_to_image(void *vedata,
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int initial_frame = CFRA;
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float initial_subframe = SUBFRA;
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int steps = max_ii(1, scene->eevee.motion_blur_steps);
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int time_steps_tot = (do_motion_blur) ? steps : 1;
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float shuttertime = (do_motion_blur) ? scene->eevee.motion_blur_shutter : 0.0f;
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int time_steps_tot = (do_motion_blur) ? max_ii(1, scene->eevee.motion_blur_steps) : 1;
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g_data->render_tot_samples = divide_ceil_u(scene->eevee.taa_render_samples, time_steps_tot);
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/* Centered on frame for now. */
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float time = initial_frame + initial_subframe - scene->eevee.motion_blur_shutter / 2.0f;
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/* Compute start time. The motion blur will cover `[time ...time + shuttertime]`. */
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float time = initial_frame + initial_subframe;
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switch (scene->eevee.motion_blur_position) {
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case SCE_EEVEE_MB_START:
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/* No offset. */
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break;
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case SCE_EEVEE_MB_CENTER:
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time -= shuttertime * 0.5f;
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break;
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case SCE_EEVEE_MB_END:
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time -= shuttertime;
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break;
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default:
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BLI_assert(!"Invalid motion blur position enum!");
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break;
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}
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float time_step = scene->eevee.motion_blur_shutter / time_steps_tot;
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float time_step = shuttertime / time_steps_tot;
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for (int i = 0; i < time_steps_tot && !RE_engine_test_break(engine); i++) {
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float time_prev = time;
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float time_curr = time + time_step * 0.5f;
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@ -1635,8 +1635,10 @@ typedef struct SceneEEVEE {
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int motion_blur_samples DNA_DEPRECATED;
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int motion_blur_max;
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int motion_blur_steps;
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int motion_blur_position;
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float motion_blur_shutter;
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float motion_blur_depth_scale;
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char _pad0[4];
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int shadow_method DNA_DEPRECATED;
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int shadow_cube_size;
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@ -2405,6 +2407,13 @@ enum {
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/* SHADOW_METHOD_MAX = 3, */ /* UNUSED */
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};
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/* SceneEEVEE->motion_blur_position */
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enum {
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SCE_EEVEE_MB_CENTER = 0,
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SCE_EEVEE_MB_START = 1,
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SCE_EEVEE_MB_END = 2,
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};
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/* SceneDisplay->render_aa, SceneDisplay->viewport_aa */
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enum {
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SCE_DISPLAY_AA_OFF = 0,
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@ -6851,6 +6851,17 @@ static void rna_def_scene_eevee(BlenderRNA *brna)
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{0, NULL, 0, NULL, NULL},
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};
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static const EnumPropertyItem eevee_motion_blur_position_items[] = {
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{SCE_EEVEE_MB_START, "START", 0, "Start on Frame", "The shutter opens at the current frame"},
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{SCE_EEVEE_MB_CENTER,
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"CENTER",
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0,
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"Center on Frame",
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"The shutter is open during the current frame"},
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{SCE_EEVEE_MB_END, "END", 0, "End on Frame", "The shutter closes at the current frame"},
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{0, NULL, 0, NULL, NULL},
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};
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srna = RNA_def_struct(brna, "SceneEEVEE", NULL);
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RNA_def_struct_path_func(srna, "rna_SceneEEVEE_path");
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RNA_def_struct_ui_text(srna, "Scene Display", "Scene display settings for 3d viewport");
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@ -7240,6 +7251,15 @@ static void rna_def_scene_eevee(BlenderRNA *brna)
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RNA_def_property_override_flag(prop, PROPOVERRIDE_OVERRIDABLE_LIBRARY);
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RNA_def_property_update(prop, NC_SCENE | ND_RENDER_OPTIONS, NULL);
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prop = RNA_def_property(srna, "motion_blur_position", PROP_ENUM, PROP_NONE);
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RNA_def_property_enum_items(prop, eevee_motion_blur_position_items);
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RNA_def_property_ui_text(prop,
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"Motion Blur Position",
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"Offset for the shutter's time interval, "
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"allows to change the motion blur trails");
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RNA_def_property_override_flag(prop, PROPOVERRIDE_OVERRIDABLE_LIBRARY);
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RNA_def_property_update(prop, NC_SCENE | ND_RENDER_OPTIONS, NULL);
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/* Shadows */
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prop = RNA_def_property(srna, "shadow_cube_size", PROP_ENUM, PROP_NONE);
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RNA_def_property_enum_items(prop, eevee_shadow_size_items);
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