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update hemisphere VBO on ui size change

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This commit is contained in:
barnold1953 2014-06-13 13:38:28 -07:00
parent 422db14812
commit 3747a5eeae
1 changed files with 8 additions and 3 deletions
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11
interface/src/ui/ApplicationOverlay.cpp
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@ -692,8 +692,11 @@ void ApplicationOverlay::renderTexturedHemisphere() {
static VerticesIndices vbo(0, 0);
int vertices = slices * (stacks - 1) + 1;
int indices = slices * 2 * 3 * (stacks - 2) + slices * 3;
//We only generate the VBO once
if (vbo.first == 0) {
static float oldTextureFOV = _textureFov;
//We only generate the VBO when the _textureFov changes
if (vbo.first == 0 || oldTextureFOV != _textureFov) {
oldTextureFOV = _textureFov;
TextureVertex* vertexData = new TextureVertex[vertices];
TextureVertex* vertex = vertexData;
for (int i = 0; i < stacks - 1; i++) {
@ -718,7 +721,9 @@ void ApplicationOverlay::renderTexturedHemisphere() {
vertex->uv.y = 0.5f;
vertex++;
glGenBuffers(1, &vbo.first);
if (vbo.first == 0){
glGenBuffers(1, &vbo.first);
}
glBindBuffer(GL_ARRAY_BUFFER, vbo.first);
const int BYTES_PER_VERTEX = sizeof(TextureVertex);
glBufferData(GL_ARRAY_BUFFER, vertices * BYTES_PER_VERTEX, vertexData, GL_STATIC_DRAW);