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render trails with additive blending

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This commit is contained in:
Emil Axelsson
2016-08-25 16:32:27 +02:00
parent adf02bd5f6
commit d0ec7ac735
4 changed files with 30 additions and 6 deletions
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modules/base/rendering/renderabletrail.cpp
+14
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@@ -179,6 +179,14 @@ void RenderableTrail::render(const RenderData& data) {
// _programObject->setUniform("forceFade", _distanceFade);
//}
bool usingFramebufferRenderer =
OsEng.renderEngine().rendererImplementation() == RenderEngine::RendererImplementation::Framebuffer;
if (usingFramebufferRenderer) {
glDepthMask(false);
glBlendFunc(GL_SRC_ALPHA, GL_ONE);
}
glLineWidth(_lineWidth);
glBindVertexArray(_vaoID);
@@ -194,6 +202,12 @@ void RenderableTrail::render(const RenderData& data) {
glBindVertexArray(0);
}
if (usingFramebufferRenderer) {
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glDepthMask(true);
}
_programObject->deactivate();
}