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Preserve the GL matrix stack when running batch commands

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This commit is contained in:
Bradley Austin Davis 2015-06-17 14:57:14 -07:00
parent 0568dc983e
commit a27e06713b
1 changed files with 13 additions and 16 deletions
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29
libraries/gpu/src/gpu/GLBackendTransform.cpp
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@ -75,6 +75,8 @@ void GLBackend::syncTransformStateCache() {
}
void GLBackend::updateTransform() {
GLint originalMatrixMode;
glGetIntegerv(GL_MATRIX_MODE, &originalMatrixMode);
// Check all the dirty flags and update the state accordingly
if (_transform._invalidProj) {
_transform._transformCamera._projection = _transform._projection;
@ -132,12 +134,13 @@ void GLBackend::updateTransform() {
(void) CHECK_GL_ERROR();
}
if (_transform._invalidModel || _transform._invalidView) {
if (_transform._lastMode != GL_MODELVIEW) {
glMatrixMode(GL_MODELVIEW);
_transform._lastMode = GL_MODELVIEW;
}
if (!_transform._model.isIdentity()) {
if (_transform._lastMode != GL_MODELVIEW) {
glMatrixMode(GL_MODELVIEW);
_transform._lastMode = GL_MODELVIEW;
}
Transform::Mat4 modelView;
if (!_transform._view.isIdentity()) {
Transform mvx;
@ -147,19 +150,12 @@ void GLBackend::updateTransform() {
_transform._model.getMatrix(modelView);
}
glLoadMatrixf(reinterpret_cast< const GLfloat* >(&modelView));
} else if (!_transform._view.isIdentity()) {
Transform::Mat4 modelView;
_transform._view.getInverseMatrix(modelView);
glLoadMatrixf(reinterpret_cast< const GLfloat* >(&modelView));
} else {
if (!_transform._view.isIdentity()) {
if (_transform._lastMode != GL_MODELVIEW) {
glMatrixMode(GL_MODELVIEW);
_transform._lastMode = GL_MODELVIEW;
}
Transform::Mat4 modelView;
_transform._view.getInverseMatrix(modelView);
glLoadMatrixf(reinterpret_cast< const GLfloat* >(&modelView));
} else {
// TODO: eventually do something about the matrix when neither view nor model is specified?
// glLoadIdentity();
}
glLoadIdentity();
}
(void) CHECK_GL_ERROR();
}
@ -167,6 +163,7 @@ void GLBackend::updateTransform() {
// Flags are clean
_transform._invalidView = _transform._invalidProj = _transform._invalidModel = false;
glMatrixMode(originalMatrixMode);
}