Allows the use of clip planes with OpenGL-ES1

2 files changed, 28 insertions, 3 deletions

diff --git a/ardor3d-core/src/main/java/com/ardor3d/renderer/ContextCapabilities.java b/ardor3d-core/src/main/java/com/ardor3d/renderer/ContextCapabilities.java
index 3e8d55c..9599e0e 100644
--- a/ardor3d-core/src/main/java/com/ardor3d/renderer/ContextCapabilities.java
+++ b/ardor3d-core/src/main/java/com/ardor3d/renderer/ContextCapabilities.java
@@ -16,6 +16,8 @@ public class ContextCapabilities {
     protected boolean _supportsGL1_2 = false;
     protected boolean _supportsMultisample = false;
 
+    protected boolean _supportsDoubleCoefficientsInClipPlaneEquation = false;
+
     protected boolean _supportsConstantColor = false;
     protected boolean _supportsEq = false;
     protected boolean _supportsSeparateEq = false;
@@ -186,6 +188,7 @@ public class ContextCapabilities {
         _supportsMirrorEdgeClamp = source._supportsMirrorEdgeClamp;
         _supportsMirroredRepeat = source._supportsMirroredRepeat;
         _supportsMultisample = source._supportsMultisample;
+        _supportsDoubleCoefficientsInClipPlaneEquation = source._supportsDoubleCoefficientsInClipPlaneEquation;
         _supportsMultiTexture = source._supportsMultiTexture;
         _supportsNonPowerTwo = source._supportsNonPowerTwo;
         _supportsPointParameters = source._supportsPointParameters;
@@ -229,6 +232,13 @@ public class ContextCapabilities {
     }
 
     /**
+     * @return true if double coefficients are supported in clip plane equation
+     */
+    public boolean areDoubleCoefficientsInClipPlaneEquationSupported() {
+        return _supportsDoubleCoefficientsInClipPlaneEquation;
+    }
+
+    /**
      * @return true if we support fbo multisampling (antialiasing)
      */
     public boolean isFBOMultisampleSupported() {
diff --git a/ardor3d-core/src/main/java/com/ardor3d/renderer/state/record/ClipStateRecord.java b/ardor3d-core/src/main/java/com/ardor3d/renderer/state/record/ClipStateRecord.java
index 7dba025..eeedf23 100644
--- a/ardor3d-core/src/main/java/com/ardor3d/renderer/state/record/ClipStateRecord.java
+++ b/ardor3d-core/src/main/java/com/ardor3d/renderer/state/record/ClipStateRecord.java
@@ -10,16 +10,31 @@
 
 package com.ardor3d.renderer.state.record;
 
-import java.nio.DoubleBuffer;
+import java.nio.Buffer;
 import java.util.Arrays;
 
+import com.ardor3d.renderer.ContextCapabilities;
+import com.ardor3d.renderer.ContextManager;
+import com.ardor3d.renderer.RenderContext;
 import com.ardor3d.renderer.state.ClipState;
 import com.ardor3d.util.geom.BufferUtils;
 
 public class ClipStateRecord extends StateRecord {
 
-    public final boolean[] planeEnabled = new boolean[ClipState.MAX_CLIP_PLANES];
-    public final DoubleBuffer buf = BufferUtils.createDoubleBuffer(4);
+    public final boolean[] planeEnabled;
+    public final Buffer buf;
+
+    public ClipStateRecord() {
+        planeEnabled = new boolean[ClipState.MAX_CLIP_PLANES];
+        final RenderContext context = ContextManager.getCurrentContext();
+        final ContextCapabilities caps = context.getCapabilities();
+        if (caps.areDoubleCoefficientsInClipPlaneEquationSupported()) {
+            buf = BufferUtils.createDoubleBuffer(4);
+        } else {
+            buf = BufferUtils.createFloatBuffer(4);
+        }
+
+    }
 
     @Override
     public void invalidate() {