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EMI: Only draw models for actors inside the view frustum.

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This adds math classes for doing frustum culling in software. These could be used for optimizing performance in many other places as well. For example, if an actor is outside the view frustum, it may not be necessary to do expensive keyframe animation and vertex skinning calculations for that actor.
This commit is contained in:
Joni Vähämäki 2014-06-09 18:41:01 +03:00
parent 8f9f541f17
commit b5cdd1240f
26 changed files with 510 additions and 23 deletions
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29
engines/grim/gfx_opengl.cpp
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@ -256,6 +256,35 @@ void GfxOpenGL::positionCamera(const Math::Vector3d &pos, const Math::Vector3d &
}
}
Math::Matrix4 GfxOpenGL::getModelView() {
Math::Matrix4 modelView;
if (g_grim->getGameType() == GType_MONKEY4) {
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
Math::Matrix4 worldRot = _currentQuat.toMatrix();
glMultMatrixf(worldRot.getData());
glTranslatef(-_currentPos.x(), -_currentPos.y(), -_currentPos.z());
glGetFloatv(GL_MODELVIEW_MATRIX, modelView.getData());
glPopMatrix();
} else {
glGetFloatv(GL_MODELVIEW_MATRIX, modelView.getData());
}
modelView.transpose();
return modelView;
}
Math::Matrix4 GfxOpenGL::getProjection() {
Math::Matrix4 projection;
glGetFloatv(GL_PROJECTION_MATRIX, projection.getData());
projection.transpose();
return projection;
}
void GfxOpenGL::clearScreen() {
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
}