1 files changed, 38 insertions, 2 deletions
diff --git a/source/blender/simulation/intern/time_interval.hh b/source/blender/simulation/intern/time_interval.hh
index 49600dd10de..5996dc5d25b 100644
--- a/source/blender/simulation/intern/time_interval.hh
+++ b/source/blender/simulation/intern/time_interval.hh
@@ -22,7 +22,7 @@
 namespace blender::sim {
 
 /**
- * The start time is inclusive and the end time is exclusive. The duration is zero, the interval
+ * The start time is exclusive and the end time is inclusive. If the duration is zero, the interval
  * describes a single point in time.
  */
 class TimeInterval {
@@ -41,7 +41,7 @@ class TimeInterval {
     return start_;
   }
 
-  float end() const
+  float stop() const
   {
     return start_ + duration_;
   }
@@ -50,6 +50,42 @@ class TimeInterval {
   {
     return duration_;
   }
+
+  float time_at_factor(float factor) const
+  {
+    return start_ + factor * duration_;
+  }
+
+  float factor_at_time(float time) const
+  {
+    BLI_assert(duration_ > 0.0f);
+    return (time - start_) / duration_;
+  }
+
+  float safe_factor_at_time(float time) const
+  {
+    if (duration_ > 0.0f) {
+      return this->factor_at_time(time);
+    }
+    return 0.0f;
+  }
+
+  void compute_uniform_samples(MutableSpan<float> r_samples) const
+  {
+    int64_t amount = r_samples.size();
+    if (amount == 0) {
+      return;
+    }
+    if (amount == 1) {
+      r_samples[0] = this->time_at_factor(0.5f);
+      return;
+    }
+
+    const float step = duration_ / (float)(amount - 1);
+    for (int64_t i : r_samples.index_range()) {
+      r_samples[i] = start_ + i * step;
+    }
+  }
 };
 
 }  // namespace blender::sim