From 0156cc8da6eab109fd195fc38189242ad0426278 Mon Sep 17 00:00:00 2001
From: jkjkil4 <1173374788@qq.com>
Date: Thu, 27 Jun 2024 21:56:44 +0800
Subject: [PATCH] fix: incorrect time-range of render calls

---
 janim/anims/animation.py   | 4 ++++
 janim/anims/composition.py | 2 +-
 janim/anims/timeline.py    | 4 ++--
 3 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/janim/anims/animation.py b/janim/anims/animation.py
index ea36ed3..e7a4d1a 100644
--- a/janim/anims/animation.py
+++ b/janim/anims/animation.py
@@ -91,6 +91,10 @@ def get_alpha_on_global_t(self, global_t: float) -> float:
         anim_t = self.parent.get_anim_t(self.parent.get_alpha_on_global_t(global_t), self)
         return self.rate_func(anim_t / self.local_range.duration)
 
+    def is_visible(self, global_t: float) -> bool:
+        # + 1e-5 是为了避免在两端的浮点误差
+        return self.global_range.at <= global_t + 1e-5 < self.global_range.end
+
     global_t_ctx: ContextVar[float] = ContextVar('Animation.global_t_ctx')
     '''
     对该值进行设置，使得进行 :meth:`anim_on` 和 :meth:`render` 时不需要将 ``global_t`` 作为参数传递也能获取到
diff --git a/janim/anims/composition.py b/janim/anims/composition.py
index 3182823..b162ccc 100644
--- a/janim/anims/composition.py
+++ b/janim/anims/composition.py
@@ -124,7 +124,7 @@ def anim_on_alpha(self, alpha: float) -> None:
 
         for anim in self.anims:
             anim_t = self.get_anim_t(alpha, anim)
-            if anim.global_range.at <= global_t < anim.global_range.end:
+            if anim.is_visible(global_t):
                 anim.anim_on(anim_t)
 
 
diff --git a/janim/anims/timeline.py b/janim/anims/timeline.py
index 6b724ef..d376f03 100644
--- a/janim/anims/timeline.py
+++ b/janim/anims/timeline.py
@@ -235,7 +235,7 @@ def schedule(self, at: float, func: Callable, *args, **kwargs) -> None:
         会在进度达到 ``at`` 时，对 ``func`` 进行调用，
         可传入 ``*args`` 和 ``**kwargs``
         '''
-        rough_at = round(at, 4)    # 防止因为精度误差使得本来计划更迟的任务被更早地执行了
+        rough_at = round(at, 3)    # 防止因为精度误差使得本来计划更迟的任务被更早地执行了
         task = Timeline.ScheduledTask(rough_at, func, args, kwargs)
         insort(self.scheduled_tasks, task, key=lambda x: x.at)
 
@@ -824,7 +824,7 @@ def render_all(self, ctx: mgl.Context) -> None:
                         *[
                             anim.render_call_list
                             for anim in self.flattened
-                            if anim.render_call_list and anim.global_range.at <= self._time < anim.global_range.end
+                            if anim.render_call_list and anim.is_visible(self._time)
                         ],
                         key=lambda x: x.depth,
                         reverse=True