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v0.4.2: vertex buffers now support selective updating

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Evan Debenham 2016-08-26 18:16:09 -04:00 committed by Evan Debenham
parent 1461003683
commit 7a2e6c63c1
1 changed files with 35 additions and 10 deletions
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45
SPD-classes/src/main/java/com/watabou/glwrap/Vertexbuffer.java
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@ -30,7 +30,7 @@ public class Vertexbuffer {
private int id; private int id;
private FloatBuffer vertices; private FloatBuffer vertices;
private boolean needsUpdate; private int updateStart, updateEnd;
private static ArrayList<Vertexbuffer> buffers = new ArrayList<>(); private static ArrayList<Vertexbuffer> buffers = new ArrayList<>();
@ -42,24 +42,49 @@ public class Vertexbuffer {
this.vertices = vertices; this.vertices = vertices;
buffers.add(this); buffers.add(this);
//forces an update so the GL data isn't blank updateStart = 0;
needsUpdate = true; updateEnd = vertices.limit();
updateGLData();
} }
//For flagging the buffer for a full update without changing anything
public void updateVertices(){
updateVertices(vertices);
}
//For flagging an update with a full set of new data
public void updateVertices( FloatBuffer vertices ){ public void updateVertices( FloatBuffer vertices ){
updateVertices(vertices, 0, vertices.limit());
}
//For flagging an update with a subset of data changed
public void updateVertices( FloatBuffer vertices, int start, int end){
this.vertices = vertices; this.vertices = vertices;
needsUpdate = true;
if (updateStart == -1)
updateStart = start;
else
updateStart = Math.min(start, updateStart);
if (updateEnd == -1)
updateEnd = end;
else
updateEnd = Math.max(end, updateEnd);
} }
public void updateGLData(){ public void updateGLData(){
if (!needsUpdate) return; if (updateStart == -1) return;
vertices.position(0); vertices.position(updateStart);
bind(); bind();
GLES20.glBufferData(GLES20.GL_ARRAY_BUFFER, (vertices.limit()*4), vertices, GLES20.GL_DYNAMIC_DRAW);
if (updateStart == 0 && updateEnd == vertices.limit()){
GLES20.glBufferData(GLES20.GL_ARRAY_BUFFER, vertices.limit()*4, vertices, GLES20.GL_DYNAMIC_DRAW);
} else {
GLES20.glBufferSubData(GLES20.GL_ARRAY_BUFFER, updateStart*4, (updateEnd - updateStart)*4, vertices);
}
release(); release();
needsUpdate = false; updateStart = updateEnd = -1;
} }
public void bind(){ public void bind(){
@ -77,7 +102,7 @@ public class Vertexbuffer {
public static void refreshAllBuffers(){ public static void refreshAllBuffers(){
for (Vertexbuffer buf : buffers) { for (Vertexbuffer buf : buffers) {
buf.needsUpdate = true; buf.updateVertices();
buf.updateGLData(); buf.updateGLData();
} }
} }