diff options
Diffstat (limited to 'indra/newview/llworldmapview.cpp')
| -rw-r--r-- | indra/newview/llworldmapview.cpp | 22 |
1 files changed, 20 insertions, 2 deletions
diff --git a/indra/newview/llworldmapview.cpp b/indra/newview/llworldmapview.cpp index 0c37bb6eb1..151180aae7 100644 --- a/indra/newview/llworldmapview.cpp +++ b/indra/newview/llworldmapview.cpp @@ -900,14 +900,32 @@ void LLWorldMapView::drawFrustum() // fade out in distance. gGL.begin( LLRender::TRIANGLES ); { - LLVector2 cam_lookat(LLViewerCamera::instance().getAtAxis().mV[VX], LLViewerCamera::instance().getAtAxis().mV[VY]); - LLVector2 cam_left(LLViewerCamera::instance().getLeftAxis().mV[VX], LLViewerCamera::instance().getLeftAxis().mV[VY]); + // get camera look at and left axes + LLVector3 at_axis = LLViewerCamera::instance().getAtAxis(); + LLVector3 left_axis = LLViewerCamera::instance().getLeftAxis(); + + // grab components along XY plane + LLVector2 cam_lookat(at_axis.mV[VX], at_axis.mV[VY]); + LLVector2 cam_left(left_axis.mV[VX], left_axis.mV[VY]); + + // but, when looking near straight up or down... + if (is_approx_zero(cam_lookat.magVecSquared())) + { + //...just fall back to looking down the x axis + cam_lookat = LLVector2(1.f, 0.f); // x axis + cam_left = LLVector2(0.f, 1.f); // y axis + } + + // normalize to unit length + cam_lookat.normVec(); + cam_left.normVec(); gGL.color4f(1.f, 1.f, 1.f, 0.25f); gGL.vertex2f( 0, 0 ); gGL.color4f(1.f, 1.f, 1.f, 0.02f); + // use 2d camera vectors to render frustum triangle LLVector2 vert = cam_lookat * far_clip_pixels + cam_left * half_width_pixels; gGL.vertex2f(vert.mV[VX], vert.mV[VY]); |