width, height - int
The dimensions of the viewport
+ physical-dimensions
+ The physical dimension of the projection surface.
+ Use this together with the master-perspective, right-of-perspective
+ left-of-perspective, above-perspective, below-perspective or
+ reference-points-perspective
+
+ width, height - double
+ The dimensions of the projection plane, if unset the veiwport values
+ are taken as default.
+
+ bezel
+ Gives informantion about the bezel of monitors for a seamless view.
+
+ right
+ right bezel with in the same units than with and height above
+
+ left
+ left bezel with in the same units than with and height above
+
+ top
+ top bezel with in the same units than with and height above
+
+ bottom
+ bottom bezel with in the same units than with and height above
+
view
The view node specifies the origin and direction of the camera in
relation to the whole camera group. The coordinate system is +y up,
This specifies an orthographic view. The parameters are the sames as
the frustum node's.
+ master-perspective
+ Defines a persective projection matrix for use as the leading display
+ in a seamless multiscreen configuration. This kind of perspective
+ projection is zoomable.
+
+ eye-distance - double
+ The distance of the eyepoint from the projection surface in units of
+ the physical-dimensions values above.
+
+ x-offset, y-offset - double
+ Offset of the eyelpint from the center of the screen in units of
+ the physical-dimensions values above.
+
+ left-of-perspective, right-of-perspective, above-perspective,
+ below-perspective
+ Defines a perspective projection matrix for use as derived display
+ in a seamless multiscreen configuration. The projection matrix
+ is computed so that the respective edge of this display matches the
+ assiciated other edge of the other display. For example the right edge
+ of a left-of-perspective display matches the left edge of the parent
+ display. This also works with different zoom levels, leading to distorted
+ but still seamless multiview configurations.
+ The bezel with configured in the physical dimensions of this screen and
+ the parent screen are taken into account for this type of projection.
+
+ parent-camera - string
+ Name of the parent camera.
+
+ reference-points-perspective
+ Defines a perspective projection matrix for use as derived display
+ in a seamless multiscreen configuration. This type is very similar to
+ left-of-perspective and friends. It is just a more flexible but less
+ convenient way to get the same effect. A child display is configured
+ by 2 sets of reference points one in this current camera and one in
+ the parrent camera which should match in the final view.
+
+ parent-camera - string
+ Name of the parent camera.
+
+ this
+ reference points for this projection.
+
+ point - array of two points
+
+ x, y - double
+ x and y coodinates of the reference points in units of this
+ physical-dimensions.
+
+ parent
+ reference points for the parent projection.
+
+ point - array of two points
+
+ x, y - double
+ x and y coodinates of the reference points in units of the
+ parents physical-dimensions.
+
texture
This tag indicates that the camera renders to a texture instead of the
framebuffer. For now the following tags are supported, but obviously
</sim>
</PropertyList>
+Here is an example for a 3 screen seamless zoomable multiscreen
+configuration using 3 533mmx300mm displays each with a 23mm bezel.
+The side views are angled with 45 deg.
+The commented out reference-points-perspective shows the
+aequivalent configuration than the active right-of-perspective.
+This is done by just using two reference points at the outer
+edge of the bezel of the respective display.
+
+<PropertyList>
+ <sim>
+ <view n="0">
+ <config>
+ <pitch-offset-deg>0.0</pitch-offset-deg>
+ </config>
+ </view>
+
+ <rendering>
+ <camera-group>
+ <window>
+ <name type="string">0.0</name>
+ <host-name type="string"></host-name>
+ <display>0</display>
+ <screen>0</screen>
+ <fullscreen type="bool">true</fullscreen>
+ </window>
+
+ <window>
+ <name type="string">0.1</name>
+ <host-name type="string"></host-name>
+ <display>0</display>
+ <screen>1</screen>
+ <fullscreen type="bool">true</fullscreen>
+ </window>
+
+ <camera>
+ <name type="string">CenterCamera</name>
+ <window>
+ <name>0.0</name>
+ </window>
+ <viewport>
+ <x>0</x>
+ <y>0</y>
+ <width>1920</width>
+ <height>1080</height>
+ </viewport>
+ <view>
+ <heading-deg type="double">0.0</heading-deg>
+ <roll-deg type="double">0.0</roll-deg>
+ <pitch-deg type="double">0.0</pitch-deg>
+ </view>
+ <physical-dimensions>
+ <!-- The size of the projection plane: 533mm 300mm -->
+ <width>533</width>
+ <height>300</height>
+ <bezel>
+ <right>23</right>
+ <left>23</left>
+ <top>23</top>
+ <bottom>23</bottom>
+ </bezel>
+ </physical-dimensions>
+ <master-perspective>
+ <!-- Cheating, the real distance is about 800mm.
+ But then the screen does not show what is needed to fly.
+ By shortening this pictures get bigger but the view also gets
+ less realistic.
+ -->
+ <eye-distance>450</eye-distance>
+ <x-offset>0</x-offset>
+ <y-offset>130</y-offset>
+ </master-perspective>
+ </camera>
+ <camera>
+ <name type="string">RightCamera</name>
+ <window>
+ <name>0.0</name>
+ </window>
+ <viewport>
+ <x>1920</x>
+ <y>0</y>
+ <width>1920</width>
+ <height>1080</height>
+ </viewport>
+ <view>
+ <heading-deg type="double">-45</heading-deg>
+ <roll-deg type="double">0</roll-deg>
+ <pitch-deg type="double">0</pitch-deg>
+ </view>
+ <physical-dimensions>
+ <!-- The size of the projection plane: 533mm 300mm -->
+ <width>533</width>
+ <height>300</height>
+ <bezel>
+ <right>23</right>
+ <left>23</left>
+ <top>23</top>
+ <bottom>23</bottom>
+ </bezel>
+ </physical-dimensions>
+ <right-of-perspective>
+ <parent-camera type="string">CenterCamera</parent-camera>
+ </right-of-perspective>
+ <!-- <reference-points-perspective> -->
+ <!-- <parent-camera type="string">CenterCamera</parent-camera> -->
+ <!-- <parent> -->
+ <!-- <point n="0"> -->
+ <!-- <x>289.5</x> -->
+ <!-- <y>100</y> -->
+ <!-- </point> -->
+ <!-- <point n="1"> -->
+ <!-- <x>289.5</x> -->
+ <!-- <y>-100</y> -->
+ <!-- </point> -->
+ <!-- </parent> -->
+ <!-- <this> -->
+ <!-- <point n="0"> -->
+ <!-- <x>-289.5</x> -->
+ <!-- <y>100</y> -->
+ <!-- </point> -->
+ <!-- <point n="1"> -->
+ <!-- <x>-289.5</x> -->
+ <!-- <y>-100</y> -->
+ <!-- </point> -->
+ <!-- </this> -->
+ <!-- </reference-points-perspective> -->
+ </camera>
+
+ <camera>
+ <name type="string">LeftCamera</name>
+ <window>
+ <name>0.1</name>
+ </window>
+ <viewport>
+ <x>0</x>
+ <y>0</y>
+ <width>1920</width>
+ <height>1080</height>
+ </viewport>
+ <view>
+ <heading-deg type="double">45</heading-deg>
+ <roll-deg type="double">0</roll-deg>
+ <pitch-deg type="double">0</pitch-deg>
+ </view>
+ <physical-dimensions>
+ <!-- The size of the projection plane: 533mm 300mm -->
+ <width>533</width>
+ <height>300</height>
+ <bezel>
+ <right>23</right>
+ <left>23</left>
+ <top>23</top>
+ <bottom>23</bottom>
+ </bezel>
+ </physical-dimensions>
+ <left-of-perspective>
+ <parent-camera type="string">CenterCamera</parent-camera>
+ </left-of-perspective>
+ </camera>
+ <gui>
+ <window>
+ <name type="string">0.0</name>
+ </window>
+ </gui>
+ </camera-group>
+ </rendering>
+ </sim>
+</PropertyList>
#include "CameraGroup.hxx"
+#include "fg_props.hxx"
#include "globals.hxx"
#include "renderer.hxx"
#include "FGEventHandler.hxx"
#include <osgViewer/GraphicsWindow>
#include <osgViewer/Renderer>
+static osg::Matrix
+invert(const osg::Matrix& matrix)
+{
+ return osg::Matrix::inverse(matrix);
+}
+
+/// Returns the zoom factor of the master camera.
+/// The reference fov is the historic 55 deg
+static double
+zoomFactor()
+{
+ double fov = fgGetDouble("/sim/current-view/field-of-view", 55);
+ if (fov < 1)
+ fov = 1;
+ return tan(55*0.5*SG_DEGREES_TO_RADIANS)/tan(fov*0.5*SG_DEGREES_TO_RADIANS);
+}
+
+static osg::Vec2d
+preMult(const osg::Vec2d& v, const osg::Matrix& m)
+{
+ osg::Vec3d tmp = m.preMult(osg::Vec3(v, 0));
+ return osg::Vec2d(tmp[0], tmp[1]);
+}
+
+static osg::Matrix
+relativeProjection(const osg::Matrix& P0, const osg::Matrix& R, const osg::Vec2d ref[2],
+ const osg::Matrix& pP, const osg::Matrix& pR, const osg::Vec2d pRef[2])
+{
+ // Track the way from one projection space to the other:
+ // We want
+ // P = T*S*P0
+ // where P0 is the projection template sensible for the given window size,
+ // T is a translation matrix and S a scale matrix.
+ // We need to determine T and S so that the reference points in the parents
+ // projection space match the two reference points in this cameras projection space.
+
+ // Starting from the parents camera projection space, we get into this cameras
+ // projection space by the transform matrix:
+ // P*R*inv(pP*pR) = T*S*P0*R*inv(pP*pR)
+ // So, at first compute that matrix without T*S and determine S and T from that
+
+ // Ok, now osg uses the inverse matrix multiplication order, thus:
+ osg::Matrix PtoPwithoutTS = invert(pR*pP)*R*P0;
+ // Compute the parents reference points in the current projection space
+ // without the yet unknown T and S
+ osg::Vec2d pRefInThis[2] = {
+ preMult(pRef[0], PtoPwithoutTS),
+ preMult(pRef[1], PtoPwithoutTS)
+ };
+
+ // To get the same zoom, rescale to match the parents size
+ double s = (ref[0] - ref[1]).length()/(pRefInThis[0] - pRefInThis[1]).length();
+ osg::Matrix S = osg::Matrix::scale(s, s, 1);
+
+ // For the translation offset, incorporate the now known scale
+ // and recompute the position ot the first reference point in the
+ // currents projection space without the yet unknown T.
+ pRefInThis[0] = preMult(pRef[0], PtoPwithoutTS*S);
+ // The translation is then the difference of the reference points
+ osg::Matrix T = osg::Matrix::translate(osg::Vec3d(ref[0] - pRefInThis[0], 0));
+
+ // Compose and return the desired final projection matrix
+ return P0*S*T;
+}
+
namespace flightgear
{
using namespace osg;
* osg::Matrix::rotate(orientation.inverse()));
_viewer->getCamera()->setViewMatrix(masterView);
const Matrix& masterProj = _viewer->getCamera()->getProjectionMatrix();
+ double masterZoomFactor = zoomFactor();
for (CameraList::iterator i = _cameras.begin(); i != _cameras.end(); ++i) {
const CameraInfo* info = i->get();
const View::Slave& slave = _viewer->getSlave(info->slaveIndex);
viewMatrix = masterView * slave._viewOffset;
camera->setViewMatrix(viewMatrix);
Matrix projectionMatrix;
- if ((info->flags & PROJECTION_ABSOLUTE) != 0)
- projectionMatrix = slave._projectionOffset;
- else
+ if ((info->flags & PROJECTION_ABSOLUTE) != 0) {
+ if (info->flags & ENABLE_MASTER_ZOOM) {
+ if (info->relativeCameraParent < _cameras.size()) {
+ // template projection matrix and view matrix of the current camera
+ osg::Matrix P0 = slave._projectionOffset;
+ osg::Matrix R = viewMatrix;
+
+ // The already known projection and view matrix of the parent camera
+ const CameraInfo* parentInfo = _cameras[info->relativeCameraParent].get();
+ osg::Matrix pP = parentInfo->camera->getProjectionMatrix();
+ osg::Matrix pR = parentInfo->camera->getViewMatrix();
+
+ // And the projection matrix derived from P0 so that the reference points match
+ projectionMatrix = relativeProjection(P0, R, info->thisReference,
+ pP, pR, info->parentReference);
+
+ } else {
+ // We want to zoom, so take the original matrix and apply the zoom to it.
+ projectionMatrix = slave._projectionOffset;
+ projectionMatrix.postMultScale(osg::Vec3d(masterZoomFactor, masterZoomFactor, 1));
+ }
+ } else {
+ projectionMatrix = slave._projectionOffset;
+ }
+ } else {
projectionMatrix = masterProj * slave._projectionOffset;
+ }
if (!info->farCamera.valid()) {
camera->setProjectionMatrix(projectionMatrix);
#endif
));
- osg::Matrix pOff;
osg::Matrix vOff;
const SGPropertyNode* viewNode = cameraNode->getNode("view");
if (viewNode) {
double heading = cameraNode->getDoubleValue("heading-deg", 0.0);
vOff.makeRotate(DegreesToRadians(heading), osg::Vec3(0, 1, 0));
}
- const SGPropertyNode* projectionNode = 0;
+ // Configuring the physical dimensions of a monitor
+ SGPropertyNode* viewportNode = cameraNode->getNode("viewport", true);
+ double physicalWidth = viewportNode->getDoubleValue("width", 1024);
+ double physicalHeight = viewportNode->getDoubleValue("height", 768);
+ double bezelHeightTop = 0;
+ double bezelHeightBottom = 0;
+ double bezelWidthLeft = 0;
+ double bezelWidthRight = 0;
+ const SGPropertyNode* physicalDimensionsNode = 0;
+ if ((physicalDimensionsNode = cameraNode->getNode("physical-dimensions")) != 0) {
+ physicalWidth = physicalDimensionsNode->getDoubleValue("width", physicalWidth);
+ physicalHeight = physicalDimensionsNode->getDoubleValue("height", physicalHeight);
+ const SGPropertyNode* bezelNode = 0;
+ if ((bezelNode = physicalDimensionsNode->getNode("bezel")) != 0) {
+ bezelHeightTop = bezelNode->getDoubleValue("top", bezelHeightTop);
+ bezelHeightBottom = bezelNode->getDoubleValue("bottom", bezelHeightBottom);
+ bezelWidthLeft = bezelNode->getDoubleValue("left", bezelWidthLeft);
+ bezelWidthRight = bezelNode->getDoubleValue("right", bezelWidthRight);
+ }
+ }
+ osg::Matrix pOff;
+ unsigned parentCameraIndex = ~0u;
+ osg::Vec2d parentReference[2];
+ osg::Vec2d thisReference[2];
+ SGPropertyNode* projectionNode = 0;
if ((projectionNode = cameraNode->getNode("perspective")) != 0) {
double fovy = projectionNode->getDoubleValue("fovy-deg", 55.0);
double aspectRatio = projectionNode->getDoubleValue("aspect-ratio",
}
if (projectionNode->getBoolValue("fixed-near-far", true))
cameraFlags |= FIXED_NEAR_FAR;
+ } else if ((projectionNode = cameraNode->getNode("master-perspective")) != 0) {
+ double zNear = projectionNode->getDoubleValue("eye-distance", 0.4*physicalWidth);
+ double xoff = projectionNode->getDoubleValue("x-offset", 0);
+ double yoff = projectionNode->getDoubleValue("y-offset", 0);
+ double left = -0.5*physicalWidth - xoff;
+ double right = 0.5*physicalWidth - xoff;
+ double bottom = -0.5*physicalHeight - yoff;
+ double top = 0.5*physicalHeight - yoff;
+ pOff.makeFrustum(left, right, bottom, top, zNear, zNear*1000);
+ cameraFlags |= PROJECTION_ABSOLUTE | ENABLE_MASTER_ZOOM;
+ } else if ((projectionNode = cameraNode->getNode("right-of-perspective"))
+ || (projectionNode = cameraNode->getNode("left-of-perspective"))
+ || (projectionNode = cameraNode->getNode("above-perspective"))
+ || (projectionNode = cameraNode->getNode("below-perspective"))
+ || (projectionNode = cameraNode->getNode("reference-points-perspective"))) {
+ std::string name = projectionNode->getStringValue("parent-camera");
+ for (unsigned i = 0; i < _cameras.size(); ++i) {
+ if (_cameras[i]->name != name)
+ continue;
+ parentCameraIndex = i;
+ }
+ if (_cameras.size() <= parentCameraIndex) {
+ SG_LOG(SG_GENERAL, SG_ALERT, "CameraGroup::buildCamera: "
+ "failed to find parent camera for relative camera!");
+ return 0;
+ }
+ const CameraInfo* parentInfo = _cameras[parentCameraIndex].get();
+ if (projectionNode->getNameString() == "right-of-perspective") {
+ double tmp = (parentInfo->physicalWidth + 2*parentInfo->bezelWidthRight)/parentInfo->physicalWidth;
+ parentReference[0] = osg::Vec2d(tmp, -1);
+ parentReference[1] = osg::Vec2d(tmp, 1);
+ tmp = (physicalWidth + 2*bezelWidthLeft)/physicalWidth;
+ thisReference[0] = osg::Vec2d(-tmp, -1);
+ thisReference[1] = osg::Vec2d(-tmp, 1);
+ } else if (projectionNode->getNameString() == "left-of-perspective") {
+ double tmp = (parentInfo->physicalWidth + 2*parentInfo->bezelWidthLeft)/parentInfo->physicalWidth;
+ parentReference[0] = osg::Vec2d(-tmp, -1);
+ parentReference[1] = osg::Vec2d(-tmp, 1);
+ tmp = (physicalWidth + 2*bezelWidthRight)/physicalWidth;
+ thisReference[0] = osg::Vec2d(tmp, -1);
+ thisReference[1] = osg::Vec2d(tmp, 1);
+ } else if (projectionNode->getNameString() == "above-perspective") {
+ double tmp = (parentInfo->physicalHeight + 2*parentInfo->bezelHeightTop)/parentInfo->physicalHeight;
+ parentReference[0] = osg::Vec2d(-1, tmp);
+ parentReference[1] = osg::Vec2d(1, tmp);
+ tmp = (physicalHeight + 2*bezelHeightBottom)/physicalHeight;
+ thisReference[0] = osg::Vec2d(-1, -tmp);
+ thisReference[1] = osg::Vec2d(1, -tmp);
+ } else if (projectionNode->getNameString() == "below-perspective") {
+ double tmp = (parentInfo->physicalHeight + 2*parentInfo->bezelHeightBottom)/parentInfo->physicalHeight;
+ parentReference[0] = osg::Vec2d(-1, -tmp);
+ parentReference[1] = osg::Vec2d(1, -tmp);
+ tmp = (physicalHeight + 2*bezelHeightTop)/physicalHeight;
+ thisReference[0] = osg::Vec2d(-1, tmp);
+ thisReference[1] = osg::Vec2d(1, tmp);
+ } else if (projectionNode->getNameString() == "reference-points-perspective") {
+ SGPropertyNode* parentNode = projectionNode->getNode("parent", true);
+ SGPropertyNode* thisNode = projectionNode->getNode("this", true);
+ SGPropertyNode* pointNode;
+
+ pointNode = parentNode->getNode("point", 0, true);
+ parentReference[0][0] = pointNode->getDoubleValue("x", 0)*2/parentInfo->physicalWidth;
+ parentReference[0][1] = pointNode->getDoubleValue("y", 0)*2/parentInfo->physicalHeight;
+ pointNode = parentNode->getNode("point", 1, true);
+ parentReference[1][0] = pointNode->getDoubleValue("x", 0)*2/parentInfo->physicalWidth;
+ parentReference[1][1] = pointNode->getDoubleValue("y", 0)*2/parentInfo->physicalHeight;
+
+ pointNode = thisNode->getNode("point", 0, true);
+ thisReference[0][0] = pointNode->getDoubleValue("x", 0)*2/physicalWidth;
+ thisReference[0][1] = pointNode->getDoubleValue("y", 0)*2/physicalHeight;
+ pointNode = thisNode->getNode("point", 1, true);
+ thisReference[1][0] = pointNode->getDoubleValue("x", 0)*2/physicalWidth;
+ thisReference[1][1] = pointNode->getDoubleValue("y", 0)*2/physicalHeight;
+ }
+
+ pOff = osg::Matrix::perspective(45, physicalWidth/physicalHeight, 1, 20000);
+ cameraFlags |= PROJECTION_ABSOLUTE | ENABLE_MASTER_ZOOM;
} else {
// old style shear parameters
double shearx = cameraNode->getDoubleValue("shear-x", 0);
bool useMasterSceneGraph = !psNode;
CameraInfo* info = addCamera(cameraFlags, camera, vOff, pOff,
useMasterSceneGraph);
+ info->name = cameraNode->getStringValue("name");
+ info->physicalWidth = physicalWidth;
+ info->physicalHeight = physicalHeight;
+ info->bezelHeightTop = bezelHeightTop;
+ info->bezelHeightBottom = bezelHeightBottom;
+ info->bezelWidthLeft = bezelWidthLeft;
+ info->bezelWidthRight = bezelWidthRight;
+ info->relativeCameraParent = parentCameraIndex;
+ info->parentReference[0] = parentReference[0];
+ info->parentReference[1] = parentReference[1];
+ info->thisReference[0] = thisReference[0];
+ info->thisReference[1] = thisReference[1];
// If a viewport isn't set on the camera, then it's hard to dig it
// out of the SceneView objects in the viewer, and the coordinates
// of mouse events are somewhat bizzare.
- SGPropertyNode* viewportNode = cameraNode->getNode("viewport", true);
buildViewport(info, viewportNode, window->gc->getTraits());
updateCameras(info);
// Distortion camera needs the viewport which is created by addCamera().
projects / flightgear.git / commitdiff