Restructure

Author: WeakKnight

Assets/Resources/t1m2.meta

@@ -0,0 +1,22 @@
+<scene>
+    <description text="One particle orbiting a fixed point along an elliptical orbit. A special orbit will be displayed for the analytical solution for this scene. Observe how the simulation trajectory differs from the analytical solution, and change time steps to see how that affects the trajectory."/>
+    <scenetag tag="AccuracyTestScene"/>
+
+    <duration time="250.0"/>
+    <integrator type="explicit-euler" dt="0.005"/>
+    <maxsimfreq max="500.0"/>
+    
+    <!-- The sun -->
+    <particle m="1.0" px="0.0" py="0.0" vx="0.0" vy="0.0" fixed="1" radius="0.06"/>
+    <!-- Earth -->
+    <particle m="1.0" px="8.0" py="0.0" vx="0.0" vy="2.236050808" fixed="0" radius="0.06"/>
+    
+    <gravitationalforce i="0" j="1" G="100"/>
+    
+    <particlecolor i="0" r="1.0" g="1.0" b="0.2"/>
+    <particlecolor i="1" r="0.0" g="0.8" b="0.4"/>
+    
+    <backgroundcolor r="0.0" g="0.0" b="0.0"/>
+    
+    <particlepath i="1" duration="250.0" r="0.0" g="0.8" b="0.4"/>
+</scene>

Assets/Resources/t1m2/AccuracyTests.meta

@@ -0,0 +1,22 @@
+<scene>
+    <description text="One particle orbiting a fixed point along an elliptical orbit. A special orbit will be displayed for the analytical solution for this scene. Observe how the simulation trajectory differs from the analytical solution, and change time steps to see how that affects the trajectory."/>
+    <scenetag tag="AccuracyTestScene"/>
+
+    <duration time="500.0"/>
+    <integrator type="symplectic-euler" dt="0.1"/>
+    <maxsimfreq max="500.0"/>
+    
+    <!-- The sun -->
+    <particle m="1.0" px="0.0" py="0.0" vx="0.0" vy="0.0" fixed="1" radius="0.06"/>
+    <!-- Earth -->
+    <particle m="1.0" px="8.0" py="0.0" vx="0.0" vy="2.236050808" fixed="0" radius="0.06"/>
+    
+    <gravitationalforce i="0" j="1" G="100"/>
+    
+    <particlecolor i="0" r="1.0" g="1.0" b="0.2"/>
+    <particlecolor i="1" r="0.0" g="0.8" b="0.4"/>
+    
+    <backgroundcolor r="0.0" g="0.0" b="0.0"/>
+    
+    <particlepath i="1" duration="250.0" r="0.0" g="0.8" b="0.4"/>
+</scene>

Assets/Resources/t1m2/AccuracyTests/test00explicit.xml

@@ -0,0 +1,21 @@
+<scene>
+  <description text="The earth orbiting the sun. In these units, one simulation second corresponds to one real year. Intended to benchmark the simulation against an analytical solution, to provide a basic test of the gravitational force, and to highlight differences between explicit, forward-backward, and implicit Euler. Notice how the orbit spirals outward with explicit Euler."/>
+
+  <duration time="4.0"/>
+  <integrator type="explicit-euler" dt="0.001"/>
+  <maxsimfreq max="500.0"/>
+
+  <!-- The sun -->
+  <particle m="0.331436e6" px="0.0" py="0.0" vx="0.0" vy="0.0" fixed="0" radius="0.06"/>
+  <!-- Earth -->
+  <particle m="1.0" px="1.0" py="0.0" vx="0.0" vy="6.28316" fixed="0" radius="0.02"/>
+
+  <gravitationalforce i="0" j="1" G="0.000118419"/>
+
+  <particlecolor i="0" r="1.0" g="1.0" b="0.2"/>
+  <particlecolor i="1" r="0.0" g="0.8" b="0.4"/>
+
+  <backgroundcolor r="0.0" g="0.0" b="0.0"/>
+
+  <particlepath i="1" duration="20.0" r="0.0" g="0.8" b="0.4"/>
+</scene>

Assets/Resources/t1m2/AccuracyTests/test00explicit.xml.meta

@@ -0,0 +1,21 @@
+<scene>
+  <description text="The earth orbiting the sun. In these units, one simulation second corresponds to one real year. Intended to benchmark the simulation against an analytical solution, to provide a basic test of the gravitational force, and to highlight differences between explicit, forward-backward, and implicit Euler. Notice how the orbit remains stable with forward backward Euler."/>
+
+  <duration time="4.0"/>
+  <integrator type="symplectic-euler" dt="0.001"/>
+  <maxsimfreq max="500.0"/>
+
+  <!-- The sun -->
+  <particle m="0.331436e6" px="0.0" py="0.0" vx="0.0" vy="0.0" fixed="0" radius="0.06"/>
+  <!-- Earth -->
+  <particle m="1.0" px="1.0" py="0.0" vx="0.0" vy="6.28316" fixed="0" radius="0.02"/>
+
+  <gravitationalforce i="0" j="1" G="0.000118419"/>
+
+  <particlecolor i="0" r="1.0" g="1.0" b="0.2"/>
+  <particlecolor i="1" r="0.0" g="0.8" b="0.4"/>
+
+  <backgroundcolor r="0.0" g="0.0" b="0.0"/>
+
+  <particlepath i="1" duration="20.0" r="0.0" g="0.8" b="0.4"/>
+</scene>