From b7afcdff7b068f668a3bfb032cf659693c8879f0 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Cl=C3=A9ment=20Foucault?= Date: Tue, 13 Oct 2020 16:55:19 +0200 Subject: 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 --- source/blender/draw/engines/eevee/eevee_engine.c | 24 +++++++++++++++++++----- 1 file changed, 19 insertions(+), 5 deletions(-) (limited to 'source/blender/draw/engines/eevee') diff --git a/source/blender/draw/engines/eevee/eevee_engine.c b/source/blender/draw/engines/eevee/eevee_engine.c index 872cc3247d4..355d156a083 100644 --- a/source/blender/draw/engines/eevee/eevee_engine.c +++ b/source/blender/draw/engines/eevee/eevee_engine.c @@ -460,13 +460,27 @@ static void eevee_render_to_image(void *vedata, int initial_frame = CFRA; float initial_subframe = SUBFRA; - int steps = max_ii(1, scene->eevee.motion_blur_steps); - int time_steps_tot = (do_motion_blur) ? steps : 1; + float shuttertime = (do_motion_blur) ? scene->eevee.motion_blur_shutter : 0.0f; + int time_steps_tot = (do_motion_blur) ? max_ii(1, scene->eevee.motion_blur_steps) : 1; g_data->render_tot_samples = divide_ceil_u(scene->eevee.taa_render_samples, time_steps_tot); - /* Centered on frame for now. */ - float time = initial_frame + initial_subframe - scene->eevee.motion_blur_shutter / 2.0f; + /* Compute start time. The motion blur will cover `[time ...time + shuttertime]`. */ + float time = initial_frame + initial_subframe; + switch (scene->eevee.motion_blur_position) { + case SCE_EEVEE_MB_START: + /* No offset. */ + break; + case SCE_EEVEE_MB_CENTER: + time -= shuttertime * 0.5f; + break; + case SCE_EEVEE_MB_END: + time -= shuttertime; + break; + default: + BLI_assert(!"Invalid motion blur position enum!"); + break; + } - float time_step = scene->eevee.motion_blur_shutter / time_steps_tot; + float time_step = shuttertime / time_steps_tot; for (int i = 0; i < time_steps_tot && !RE_engine_test_break(engine); i++) { float time_prev = time; float time_curr = time + time_step * 0.5f; -- cgit v1.2.3