From 2bc43c7ec410b9045fc25680d7a6ff837993fb48 Mon Sep 17 00:00:00 2001
From: faiface <faiface@ksp.sk>
Date: Thu, 24 Nov 2016 22:20:31 +0100
Subject: [PATCH] add VertexArray.Data function
---
pixelgl/vertex.go | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/pixelgl/vertex.go b/pixelgl/vertex.go
index 1f93a49..ec0d535 100644
--- a/pixelgl/vertex.go
+++ b/pixelgl/vertex.go
@@ -180,6 +180,17 @@ func (va *VertexArray) Draw() {
va.End()
}
+// Data returns a copy of data inside a vertex array (actually it's vertex buffer).
+func (va *VertexArray) Data() []float64 {
+ data := make([]float64, va.count*va.format.Size())
+ Do(func() {
+ gl.BindBuffer(gl.ARRAY_BUFFER, va.vbo)
+ gl.GetBufferSubData(gl.ARRAY_BUFFER, 0, 8*len(data), gl.Ptr(data))
+ gl.BindBuffer(gl.ARRAY_BUFFER, 0)
+ })
+ return data
+}
+
// UpdateData overwrites the current vertex array data starting at the index offset.
//
// Offset is not a number of bytes, instead, it's an index in the array.
--
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