commit d1fa4e16dc22689b43bb32cfa769f2f8feeef178
Author: Leszek Koltunski <leszek@koltunski.pl>
Date:   Wed May 10 16:08:32 2023 +0200

    Make the touchable part of the 'coin' in the CoinTetrahedroon a bit smaller.

diff --git a/src/main/java/org/distorted/library/mesh/MeshBase.java b/src/main/java/org/distorted/library/mesh/MeshBase.java
index 5fd645b..b9df7b3 100644
--- a/src/main/java/org/distorted/library/mesh/MeshBase.java
+++ b/src/main/java/org/distorted/library/mesh/MeshBase.java
@@ -21,7 +21,6 @@
 package org.distorted.library.mesh;
 
 import android.opengl.GLES30;
-import android.opengl.Matrix;
 
 import org.distorted.library.effect.MatrixEffect;
 import org.distorted.library.effect.VertexEffect;
@@ -263,8 +262,9 @@ public abstract class MeshBase
      float[] uniforms = new float[7];
      int start, end=-1, numComp = mEffComponent.size();
 
-     Matrix.setIdentityM(matrixP,0);
-     Matrix.setIdentityM(matrixV,0);
+     matrixP[0] = matrixP[5] = matrixP[10] = matrixP[15] = 1;
+     matrixV[0] = matrixV[5] = matrixV[10] = matrixV[15] = 1;
+
      effect.compute(uniforms,0,0,0);
      effect.apply(matrixP, matrixV, uniforms, 0);