add motion blur feature

src/main/java/com/replaymod/render/RenderSettings.java

@@ -156,6 +156,8 @@ public class RenderSettings {
     private final boolean cameraPathExport;
     private final AntiAliasing antiAliasing;
     private final int lensBlurSamples;
+    private final int motionBlurSubframes;
+    private final float shutterAngle;
 
     private final String exportCommand;
     // We switched from rgb24 to bgra for performance at one point, so for backwards compatibility we need to
@@ -191,6 +193,8 @@ public class RenderSettings {
                 false,
                 RenderSettings.AntiAliasing.NONE,
                 16,
+                1,
+                180f,
                 "",
                 RenderSettings.EncodingPreset.MP4_CUSTOM.getValue(),
                 false
@@ -218,6 +222,8 @@ public class RenderSettings {
             boolean cameraPathExport,
             AntiAliasing antiAliasing,
             int lensBlurSamples,
+            int motionBlurSubframes,
+            float shutterAngle,
             String exportCommand,
             String exportArguments,
             boolean highPerformance
@@ -242,6 +248,8 @@ public class RenderSettings {
         this.cameraPathExport = cameraPathExport;
         this.antiAliasing = antiAliasing;
         this.lensBlurSamples = lensBlurSamples;
+        this.motionBlurSubframes = motionBlurSubframes;
+        this.shutterAngle = shutterAngle;
         this.exportCommand = exportCommand;
         this.exportArguments = exportArguments;
         this.highPerformance = highPerformance;
@@ -269,6 +277,8 @@ public class RenderSettings {
                 cameraPathExport,
                 antiAliasing,
                 lensBlurSamples,
+                motionBlurSubframes,
+                shutterAngle,
                 exportCommand,
                 exportArguments,
                 highPerformance
@@ -464,6 +474,10 @@ public class RenderSettings {
 
     public int getLensBlurSamples() { return lensBlurSamples; }
 
+    public int getMotionBlurSubframes() { return motionBlurSubframes; }
+
+    public float getShutterAngle() { return shutterAngle; }
+
     public String getExportCommand() {
         return exportCommand;
     }

src/main/java/com/replaymod/render/capturer/RealLensOpenGlFrameCapturer.java

@@ -8,6 +8,13 @@ import com.replaymod.replaystudio.pathing.path.Path;
 import com.replaymod.simplepathing.ReplayModSimplePathing;
 import com.replaymod.pathing.properties.LensProperties;
 
+import com.replaymod.render.RenderSettings;
+import com.replaymod.render.utils.ByteBufferPool;
+import com.replaymod.replay.ReplayHandler;
+import com.replaymod.replay.ReplayModReplay;
+import com.replaymod.replaystudio.pathing.path.Timeline;
+import com.replaymod.simplepathing.SPTimeline;
+
 import org.apache.commons.lang3.tuple.Triple;
 
 import java.util.Collections;
@@ -15,6 +22,10 @@ import java.util.Map;
 
 import java.util.concurrent.ThreadLocalRandom;
 
+import java.nio.ByteBuffer;
+
+import de.johni0702.minecraft.gui.utils.lwjgl.Dimension;
+
 public class RealLensOpenGlFrameCapturer
         extends OpenGlFrameCapturer<RealLensOpenGlFrame, RealLensOpenGlFrameCapturer.Data> {
 
@@ -78,41 +89,84 @@ public class RealLensOpenGlFrameCapturer
     }
 
     private final Path positionPath;
+    private final Timeline timeline;
+    private final ReplayHandler replayHandler;
 
     public RealLensOpenGlFrameCapturer(
             WorldRenderer worldRenderer,
             RenderInfo renderInfo
     ) {
         super(worldRenderer, renderInfo);
-        this.positionPath = ReplayModSimplePathing.instance.getCurrentTimeline().getPositionPath();
+        SPTimeline spTimeline = ReplayModSimplePathing.instance.getCurrentTimeline();
+        this.positionPath  = spTimeline.getPositionPath();
+        this.timeline      = spTimeline.getTimeline();
+        this.replayHandler = ReplayModReplay.instance.getReplayHandler();
     }
 
     @Override
     public Map<Channel, RealLensOpenGlFrame> process() {
-        float partialTicks = renderInfo.updateForNextFrame();
+        // Продвигает состояние игры к времени ТЕКУЩЕГО выходного кадра
+        // (через onTick -> timeline.applyToGame(videoTime)).
+        renderInfo.updateForNextFrame();
         int frameId = framesDone++;
 
-        int fps = renderInfo.getRenderSettings().getFramesPerSecond();
-        long keyframeTime = (long) frameId * 1000 / fps;
+        RenderSettings settings = renderInfo.getRenderSettings();
+        int   fps        = settings.getFramesPerSecond();
+        int   apertureSamples = settings.getLensBlurSamples();
+        int   subframes  = Math.max(1, settings.getMotionBlurSubframes());   // M
+        float shutter    = settings.getShutterAngle();                       // градусы
 
-        float focalDistance  = positionPath.getValue(LensProperties.FOCAL_DISTANCE,  keyframeTime).map(Triple::getLeft).orElse(5.0f);
-        float apertureRadius = positionPath.getValue(LensProperties.APERTURE_RADIUS, keyframeTime).map(Triple::getLeft).orElse(0.05f);
-        int   samples        = renderInfo.getRenderSettings().getLensBlurSamples();
+        double dt = 1000.0 / fps;                          // длительность выходного кадра, мс
+        // сколько суб-кадров затвор открыт (округляем до целого)
+        int openCount = Math.max(1, (int) Math.round(subframes * shutter / 360.0));
 
-        if (positionPath == null) {
-            System.err.println("positionPath is null!");
-            focalDistance  = Float.MAX_VALUE;
-            apertureRadius = 0.01f;
+        int width  = getFrameWidth();
+        int height = getFrameHeight();
+        int bpp    = 4;
+        int totalBytes = width * height * bpp;
+
+        // ОДИН аккумулятор на весь выходной кадр (сырой BGRA-порядок из glReadPixels)
+        long[] accumulator = new long[totalBytes];
+        int totalSamples = 0;
+
+        for (int j = 0; j < openCount; j++) {
+            // абсолютное время суб-кадра на таймлайне (мс), только вперёд
+            long tSub = (long) (frameId * dt + (j / (double) subframes) * dt);
+
+            // пересэмплить камеру + сущности + FOV/линзу на суб-времени
+            timeline.applyToGame(tSub, replayHandler);
+
+            // partialTicks для интерполяции сущностей внутри тика (50 мс)
+            float subPartialTicks = (float) ((tSub % 50L) / 50.0);
+
+            // DOF-параметры берём тоже на суб-времени, чтобы фокус ехал во время смаза
+            float focalDistance  = positionPath.getValue(LensProperties.FOCAL_DISTANCE,  tSub).map(Triple::getLeft).orElse(5.0f);
+            float apertureRadius = positionPath.getValue(LensProperties.APERTURE_RADIUS, tSub).map(Triple::getLeft).orElse(0.05f);
+
+            Data[] cameras = calculateCameras(focalDistance, apertureRadius, apertureSamples);
+
+            for (Data cam : cameras) {
+                OpenGlFrame sub = renderFrame(frameId, subPartialTicks, cam);
+                ByteBuffer buf = sub.getByteBuffer();
+                buf.rewind();
+                for (int i = 0; i < totalBytes; i++) {
+                    accumulator[i] += (buf.get(i) & 0xFF);
+                }
+                ByteBufferPool.release(buf);   // сразу освобождаем -> нет OOM
+                totalSamples++;
+            }
         }
 
-        Data[] cameras = calculateCameras(focalDistance, apertureRadius, samples);
-
-        OpenGlFrame[] frames = new OpenGlFrame[cameras.length];
-
-        for (int i = 0; i < cameras.length; i++) {
-            frames[i] = renderFrame(frameId, partialTicks, cameras[i]);
+        // усредняем в один кадр
+        ByteBuffer out = ByteBufferPool.allocate(totalBytes);
+        for (int i = 0; i < totalBytes; i++) {
+            out.put((byte) (accumulator[i] / totalSamples));
         }
+        out.rewind();
 
-        return Collections.singletonMap(Channel.BRGA, new RealLensOpenGlFrame(frames));
+        OpenGlFrame averaged = new OpenGlFrame(frameId, new Dimension(width, height), bpp, out);
+        // Оборачиваем в RealLensOpenGlFrame с ОДНИМ кадром — процессор его пропустит через
+        // openGlBytesToBitmap (flip + swap R/B) и поделит на 1. Результат идентичен старому DOF.
+        return Collections.singletonMap(Channel.BRGA, new RealLensOpenGlFrame(new OpenGlFrame[]{ averaged }));
     }
 }

src/main/java/com/replaymod/render/gui/GuiExportFailed.java

@@ -102,6 +102,8 @@ public class GuiExportFailed extends GuiScreen {
                     oldSettings.isCameraPathExport(),
                     oldSettings.getAntiAliasing(),
                     oldSettings.getLensBlurSamples(),
+                    oldSettings.getMotionBlurSubframes(),
+                    oldSettings.getShutterAngle(),
                     oldSettings.getExportCommand(),
                     oldSettings.getEncodingPreset().getValue(),
                     oldSettings.isHighPerformance()

src/main/java/com/replaymod/render/gui/GuiRenderSettings.java

@@ -104,6 +104,8 @@ public class GuiRenderSettings extends AbstractGuiPopup<GuiRenderSettings> {
     public final GuiNumberField videoWidth = new GuiNumberField().setSize(50, 20).setMinValue(1).setValidateOnFocusChange(true);
     public final GuiNumberField videoHeight = new GuiNumberField().setSize(50, 20).setMinValue(1).setValidateOnFocusChange(true);
     public final GuiNumberField lensBlurSamples = new GuiNumberField().setSize(50, 20).setMinValue(1).setMaxValue(512).setValidateOnFocusChange(true);
+    public final GuiNumberField motionBlurSubframes = new GuiNumberField().setSize(50, 20).setMinValue(1).setMaxValue(512).setValidateOnFocusChange(true);
+    public final GuiNumberField shutterAngle = new GuiNumberField().setSize(50, 20).setMinValue(0).setMaxValue(360).setValidateOnFocusChange(true);
     public final GuiSlider frameRateSlider = new GuiSlider().onValueChanged(new Runnable() {
         @Override
         public void run() {
@@ -201,7 +203,9 @@ public class GuiRenderSettings extends AbstractGuiPopup<GuiRenderSettings> {
                             depthMap, new GuiLabel(),
                             cameraPathExport, new GuiLabel(),
                             new GuiLabel().setI18nText("replaymod.gui.rendersettings.antialiasing"), antiAliasingDropdown,
-                            new GuiLabel().setI18nText("replaymod.gui.rendersettings.lensblursamples"), lensBlurSamples));
+                            new GuiLabel().setI18nText("replaymod.gui.rendersettings.lensblursamples"), lensBlurSamples,
+                            new GuiLabel().setI18nText("replaymod.gui.rendersettings.motionblursubframes"), motionBlurSubframes,
+                            new GuiLabel().setI18nText("replaymod.gui.rendersettings.shutterangle"), shutterAngle));
 
     public final GuiTextField exportCommand = new GuiTextField().setI18nHint("replaymod.gui.rendersettings.command")
             .setSize(55, 20).setMaxLength(100).onTextChanged((old) -> updateInputs());
@@ -418,7 +422,10 @@ public class GuiRenderSettings extends AbstractGuiPopup<GuiRenderSettings> {
         boolean commandChanged = !exportCommand.getText().isEmpty();
         boolean argsChanged = !encodingPresetDropdown.getSelectedValue().getValue().equals(exportArguments.getText());
         exportReset.setEnabled(commandChanged || argsChanged);
-        lensBlurSamples.setEnabled(renderMethod == RenderSettings.RenderMethod.REALLENS);
+        boolean isRealLens = renderMethod == RenderSettings.RenderMethod.REALLENS;
+        lensBlurSamples.setEnabled(isRealLens);
+        motionBlurSubframes.setEnabled(isRealLens);
+        shutterAngle.setEnabled(isRealLens);
     }
 
     protected String updateResolution() {
@@ -546,6 +553,8 @@ public class GuiRenderSettings extends AbstractGuiPopup<GuiRenderSettings> {
         cameraPathExport.setChecked(settings.isCameraPathExport());
         antiAliasingDropdown.setSelected(settings.getAntiAliasing());
         lensBlurSamples.setValue(settings.getLensBlurSamples());
+        motionBlurSubframes.setValue(settings.getMotionBlurSubframes());
+        shutterAngle.setValue((int) settings.getShutterAngle());
         exportCommand.setText(settings.getExportCommand());
         String exportArguments = settings.getExportArguments();
         if (exportArguments == null || settings.getEncodingPreset() == null || invalidEncodingPreset) {
@@ -580,6 +589,8 @@ public class GuiRenderSettings extends AbstractGuiPopup<GuiRenderSettings> {
                 cameraPathExport.isChecked(),
                 serialize || antiAliasingDropdown.isEnabled() ? antiAliasingDropdown.getSelectedValue() : RenderSettings.AntiAliasing.NONE,
                 lensBlurSamples.getInteger(),
+                motionBlurSubframes.getInteger(),
+                (float) shutterAngle.getInteger(),
                 exportCommand.getText(),
                 exportArguments.getText(),
                 highPerformance

src/main/java/com/replaymod/simplepathing/preview/PathPreviewRenderer.java

@@ -7,6 +7,8 @@ import com.replaymod.core.versions.MCVer;
 import com.replaymod.pathing.properties.CameraProperties;
 import com.replaymod.pathing.properties.SpectatorProperty;
 import com.replaymod.pathing.properties.TimestampProperty;
+import com.replaymod.pathing.properties.LensProperties;
+import com.replaymod.pathing.properties.FovProperty;
 import com.replaymod.replay.ReplayHandler;
 import com.replaymod.replaystudio.pathing.interpolation.Interpolator;
 import com.replaymod.replaystudio.pathing.path.Keyframe;
@@ -72,6 +74,8 @@ public class PathPreviewRenderer extends EventRegistrations {
     private static final int SLOW_PATH_COLOR = 0xffcccc;
     private static final int FAST_PATH_COLOR = 0x660000;
     private static final double FASTEST_PATH_SPEED = 0.01;
+    private static final float DOF_GIZMO_SCALE = 10f;
+    private static final float DOF_GIZMO_FAR_LEN = 64f;
 
     private final ReplayModSimplePathing mod;
     private final ReplayHandler replayHandler;
@@ -209,6 +213,9 @@ public class PathPreviewRenderer extends EventRegistrations {
             //#endif
 
             int time = guiPathing.timeline.getCursorPosition();
+            float focal = path.getValue(LensProperties.FOCAL_DISTANCE, time).map(Triple::getLeft).orElse(LensProperties.DEFAULT_FOCAL_DISTANCE);
+            float aperture = path.getValue(LensProperties.APERTURE_RADIUS, time).map(Triple::getLeft).orElse(LensProperties.DEFAULT_APERTURE_RADIUS);
+            float fov = path.getValue(FovProperty.FOV, time).map(Triple::getLeft).orElse(FovProperty.DEFAULT_FOV);
             Optional<Integer> entityId = path.getValue(SpectatorProperty.PROPERTY, time);
             if (entityId.isPresent()) {
                 // Spectating an entity
@@ -218,6 +225,7 @@ public class PathPreviewRenderer extends EventRegistrations {
                         Location loc = entityTracker.getEntityPositionAtTimestamp(entityId.get(), replayTime.get());
                         if (loc != null) {
                             drawCamera(viewPos, loc2Vec(loc), new Vector3f(loc.getYaw(), loc.getPitch(), 0f));
+                            drawFocusGizmo(viewPos, loc2Vec(loc), new Vector3f(loc.getYaw(), loc.getPitch(), 0f), focal, aperture, fov);
                         }
                     }
                 }
@@ -227,6 +235,7 @@ public class PathPreviewRenderer extends EventRegistrations {
                 Optional<Vector3f> cameraRot = path.getValue(CameraProperties.ROTATION, time).map(this::tripleF2Vec);
                 if (cameraPos.isPresent() && cameraRot.isPresent()) {
                     drawCamera(viewPos, cameraPos.get(), cameraRot.get());
+                    drawFocusGizmo(viewPos, cameraPos.get(), cameraRot.get(), focal, aperture, fov);
                 }
             }
         } finally {
@@ -526,6 +535,100 @@ public class PathPreviewRenderer extends EventRegistrations {
         popMatrix();
     }
 
+    private void drawFocusGizmo(Vector3f view, Vector3f pos, Vector3f rot, float focalDistance, float apertureRadius, float fov) {
+        float a = Math.max(0.15f, apertureRadius * DOF_GIZMO_SCALE);
+        int rayColor    = 0x66ccffaa; // RGBA: голубой (лучи апертуры)
+        int markerColor = 0xffaa00ff; // RGBA: оранжевый (маркер плоскости фокуса)
+        float mr = focalDistance * (float) Math.tan(Math.toRadians(fov) / 2.0); // радиус кольца-маркера
+        int markerSeg = 12;
+
+        pushMatrix();
+
+        Vector3f t = Vector3f.sub(pos, view, null);
+        GL11.glTranslatef(t.x, t.y, t.z);
+        GL11.glRotatef(-rot.x, 0, 1, 0); // Yaw
+        GL11.glRotatef(rot.y, 1, 0, 0);  // Pitch
+        GL11.glRotatef(rot.z, 0, 0, 1);  // Roll
+
+        //#if MC>=12105
+        //$$ VertexConsumerProvider.Immediate immediate = mc.getBufferBuilders().getEntityVertexConsumers();
+        //$$ immediate.draw();
+        //#if MC>=12111
+        //$$ VertexConsumer buffer = immediate.getBuffer(RenderLayers.LINES);
+        //#else
+        //$$ VertexConsumer buffer = immediate.getBuffer(RenderLayer.LINES);
+        //#endif
+        //#else
+        Tessellator tessellator = Tessellator.getInstance();
+        //#if MC>=12100
+        //$$ BufferBuilder buffer = tessellator.begin(net.minecraft.client.render.VertexFormat.DrawMode.LINES, VertexFormats.LINES);
+        //#else
+        BufferBuilder buffer = tessellator.getBuffer();
+        buffer.begin(GL11.GL_LINES, VertexFormats.POSITION_COLOR);
+        //#endif
+        //#endif
+
+        MatrixStack ms = new MatrixStack();
+        Vector3f apex = new Vector3f(0f, 0f, focalDistance); // точка схождения
+
+        for (Vector3f edge : new Vector3f[]{
+                new Vector3f( a, 0f, 0f), new Vector3f(-a, 0f, 0f),
+                new Vector3f(0f,  a, 0f), new Vector3f(0f, -a, 0f)}) {
+            Vector3f dir = Vector3f.sub(apex, edge, null); // apex - edge
+            dir.normalise();
+            dir.scale(DOF_GIZMO_FAR_LEN);
+            Vector3f far = Vector3f.add(apex, dir, null);
+            emitLine(ms, buffer, edge, far, rayColor, 2f);
+        }
+
+        // маркер фокальной плоскости: крестик
+        emitLine(ms, buffer, new Vector3f(-mr, 0f, focalDistance), new Vector3f(mr, 0f, focalDistance), markerColor, 2f);
+        emitLine(ms, buffer, new Vector3f(0f, -mr, focalDistance), new Vector3f(0f, mr, focalDistance), markerColor, 2f);
+        // маркер фокальной плоскости: кольцо
+        Vector3f prev = null;
+        for (int i = 0; i <= markerSeg; i++) {
+            double ang = 2 * Math.PI * i / markerSeg;
+            Vector3f p = new Vector3f((float) (mr * Math.cos(ang)), (float) (mr * Math.sin(ang)), focalDistance);
+            if (prev != null) emitLine(ms, buffer, prev, p, markerColor, 2f);
+            prev = p;
+        }
+
+        //#if MC>=12105
+        //$$ immediate.draw();
+        //#else
+        //#if MC>=12102
+        //$$ RenderSystem.setShader(ShaderProgramKeys.RENDERTYPE_LINES);
+        //#elseif MC>=11700
+        //$$ RenderSystem.applyModelViewMatrix();
+        //$$ RenderSystem.setShader(GameRenderer::getRenderTypeLinesShader);
+        //#else
+        GL11.glDisable(GL11.GL_TEXTURE_2D);
+        //#endif
+
+        //#if MC>=11700
+        //$$ RenderSystem.disableCull();
+        //#endif
+
+        //#if MC>=12100
+        //$$ try (var builtBuffer = buffer.end()) {
+        //$$     net.minecraft.client.render.BufferRenderer.drawWithGlobalProgram(builtBuffer);
+        //$$ }
+        //#else
+        tessellator.draw();
+        //#endif
+
+        //#if MC>=11700
+        //$$ RenderSystem.enableCull();
+        //#endif
+
+        //#if MC<11700
+        GL11.glEnable(GL11.GL_TEXTURE_2D);
+        //#endif
+        //#endif
+
+        popMatrix();
+    }
+
     //#if MC>=12105
     //$$ private void vertex(VertexConsumer buffer, float x, float y, float z, float u, float v, int alpha) {
     //#else