271 lines
7.1 KiB
C++
271 lines
7.1 KiB
C++
#include "CameraDefinition.h"
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#include <cmath>
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#include "PackStream.h"
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#include "BoundingBox.h"
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CameraDefinition::CameraDefinition(DefinitionNode *parent) : DefinitionNode(parent, "camera", "camera") {
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location.x = 0.0;
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location.y = 0.0;
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location.z = 0.0;
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direction.phi = 0.0;
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direction.theta = 0.0;
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direction.r = 1.0;
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roll = 0.0;
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width = 1.0;
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height = 1.0;
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perspective.yfov = 1.0;
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perspective.xratio = 1.0;
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perspective.znear = 0.5;
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perspective.zfar = 20000.0;
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validate();
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}
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void CameraDefinition::save(PackStream *stream) const {
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location.save(stream);
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stream->write(&direction.r);
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stream->write(&direction.phi);
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stream->write(&direction.theta);
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stream->write(&roll);
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stream->write(&perspective.yfov);
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}
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void CameraDefinition::load(PackStream *stream) {
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location.load(stream);
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stream->read(&direction.r);
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stream->read(&direction.phi);
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stream->read(&direction.theta);
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stream->read(&roll);
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stream->read(&perspective.yfov);
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validate();
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}
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void CameraDefinition::copy(DefinitionNode *_destination) const {
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CameraDefinition *destination = (CameraDefinition *)_destination;
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destination->location = location;
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destination->direction = direction;
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destination->roll = roll;
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destination->perspective = perspective;
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destination->validate();
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}
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void CameraDefinition::validate() {
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if (location.y > 300.0) {
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location.y = 300.0;
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}
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forward.x = 1.0;
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forward.y = 0.0;
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forward.z = 0.0;
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right.x = 0.0;
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right.y = 0.0;
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right.z = 1.0;
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up.x = 0.0;
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up.y = 1.0;
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up.z = 0.0;
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Matrix4 rotation = Matrix4::newRotateEuler(direction.phi, direction.theta, roll);
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forward = rotation.multPoint(forward);
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right = rotation.multPoint(right);
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up = rotation.multPoint(up);
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target = location.add(direction);
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Matrix4 mperspective =
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Matrix4::newPerspective(perspective.yfov, perspective.xratio, perspective.znear, perspective.zfar);
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unperspective = mperspective.inversed();
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projector = mperspective.mult(Matrix4::newLookAt(location, target, up));
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unprojector = projector.inversed();
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inv_x_factor = 1.0 / (0.5 * width);
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inv_y_factor = 1.0 / (0.5 * height);
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}
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double CameraDefinition::getRealDepth(const Vector3 &projected) const {
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Vector3 v(projected.x * inv_x_factor - 1.0, -(projected.y * inv_x_factor - 1.0), projected.z);
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return unperspective.transform(v).z;
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}
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void CameraDefinition::setLocation(const Vector3 &location) {
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this->location = location;
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validate();
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}
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void CameraDefinition::setLocationCoords(double x, double y, double z) {
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location = Vector3(x, y, z);
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validate();
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}
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void CameraDefinition::setTarget(const Vector3 &target) {
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Vector3 forward;
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forward = target.sub(location);
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if (forward.getNorm() < 0.0000001) {
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return;
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}
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direction = forward.toSpherical();
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validate();
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}
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void CameraDefinition::setTargetCoords(double x, double y, double z) {
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setTarget(Vector3(x, y, z));
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}
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void CameraDefinition::setRoll(double angle) {
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roll = angle;
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validate();
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}
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void CameraDefinition::setZoomToTarget(double zoom) {
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direction.r = zoom;
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location = target.add(Vector3(direction).scale(-1.0));
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validate();
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}
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void CameraDefinition::setFov(double fov) {
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perspective.yfov = fov;
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validate();
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}
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void CameraDefinition::strafeForward(double value) {
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location = location.add(forward.scale(value));
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validate();
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}
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void CameraDefinition::strafeRight(double value) {
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location = location.add(right.scale(value));
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validate();
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}
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void CameraDefinition::strafeUp(double value) {
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location = location.add(up.scale(value));
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validate();
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}
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void CameraDefinition::rotateYaw(double value) {
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direction.phi += value;
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validate();
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}
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void CameraDefinition::rotatePitch(double value) {
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direction.theta += value;
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validate();
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}
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void CameraDefinition::rotateRoll(double value) {
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roll += value;
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validate();
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}
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void CameraDefinition::setRenderSize(int width, int height) {
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this->width = (double)width;
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this->height = (double)height;
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perspective.xratio = this->width / this->height;
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validate();
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}
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Vector3 CameraDefinition::project(const Vector3 &point) const {
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Vector3 tpoint = projector.transform(point);
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if (tpoint.z < 1.0) {
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tpoint.x = -tpoint.x;
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tpoint.y = -tpoint.y;
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}
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tpoint.x = (tpoint.x + 1.0) * 0.5 * width;
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tpoint.y = (-tpoint.y + 1.0) * 0.5 * height;
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return tpoint;
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}
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Vector3 CameraDefinition::unproject(const Vector3 &point) const {
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Vector3 tpoint(point.x / (0.5 * width) - 1.0, -(point.y / (0.5 * height) - 1.0), point.z);
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if (tpoint.z < 1.0) {
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tpoint.x = -tpoint.x;
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tpoint.y = -tpoint.y;
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}
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return unprojector.transform(tpoint);
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}
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int CameraDefinition::isBoxInView(const Vector3 ¢er, double xsize, double ysize, double zsize) const {
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BoundingBox box;
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box.pushPoint(center.add(Vector3(-xsize, -ysize, -zsize)));
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box.pushPoint(center.add(Vector3(xsize, ysize, zsize)));
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return isUnprojectedBoxInView(box);
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}
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int CameraDefinition::isUnprojectedBoxInView(const BoundingBox &box) const {
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BoundingBox projected;
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projected.pushPoint(project(Vector3(box.xmin, box.ymin, box.zmin)));
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projected.pushPoint(project(Vector3(box.xmax, box.ymin, box.zmin)));
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projected.pushPoint(project(Vector3(box.xmin, box.ymax, box.zmin)));
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projected.pushPoint(project(Vector3(box.xmax, box.ymax, box.zmin)));
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projected.pushPoint(project(Vector3(box.xmin, box.ymin, box.zmax)));
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projected.pushPoint(project(Vector3(box.xmax, box.ymin, box.zmax)));
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projected.pushPoint(project(Vector3(box.xmin, box.ymax, box.zmax)));
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projected.pushPoint(project(Vector3(box.xmax, box.ymax, box.zmax)));
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return isProjectedBoxInView(projected);
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}
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int CameraDefinition::isProjectedBoxInView(const BoundingBox &box) const {
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if (box.xmin <= width && box.xmax >= 0.0 && box.ymin <= height && box.ymax >= 0.0 &&
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box.zmax >= perspective.znear) {
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double dx = box.xmax - box.xmin;
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double dy = box.ymax - box.ymin;
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return (int)ceil(dx) * (int)ceil(dy);
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} else {
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return 0;
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}
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}
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bool CameraDefinition::transitionToAnother(const CameraDefinition *wanted, double factor) {
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double dx, dy, dz, dr, dphi, dtheta, droll;
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dx = wanted->location.x - location.x;
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dy = wanted->location.y - location.y;
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dz = wanted->location.z - location.z;
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dr = wanted->direction.r - direction.r;
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dphi = wanted->direction.phi - direction.phi;
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dtheta = wanted->direction.theta - direction.theta;
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droll = wanted->roll - roll;
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if (fabs(dx) < 0.000001 && fabs(dy) < 0.000001 && fabs(dz) < 0.000001 && fabs(dr) < 0.000001 &&
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fabs(dphi) < 0.000001 && fabs(dtheta) < 0.000001 && fabs(droll) < 0.000001) {
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return false;
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} else {
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location.x += dx * factor;
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location.y += dy * factor;
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location.z += dz * factor;
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direction.r += dr * factor;
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direction.phi += dphi * factor;
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direction.theta += dtheta * factor;
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roll += droll * factor;
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validate();
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return true;
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}
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}
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