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I have a set of 3D face scan obj files I need to display, and I am looking to center each mesh in the world origin.
I have an example below with one of the actual meshes, but if you look, I just tweaked some numbers and rotated it to look right:
mesh.position.x = .1;
mesh.position.y = .46;
mesh.position.z = 0;
mesh.setPivotPoint(mesh.getBoundingInfo().boundingBox.center);
mesh.rotate(BABYLON.Axis.Y, -(Math.PI / 2), BABYLON.Space.WORLD);
mesh.rotate(BABYLON.Axis.X, -(Math.PI / 2), BABYLON.Space.WORLD);
I enabled the bounding box and that is correct.
How can I render each one centered on the origin without magic numbers?
Thanks!
var canvas = document.getElementById("renderCanvas"); // Get the canvas element
var engine = new BABYLON.Engine(canvas, true);
var createScene = function () {
var scene = new BABYLON.Scene(engine);
scene.clearColor = new BABYLON.Color3.FromInts(1, 1, 1);
//Adding a light
var light = new BABYLON.PointLight("Omni", new BABYLON.Vector3(20, 20, 100), scene);
//Adding an Arc Rotate Camera
// var camera = new BABYLON.ArcRotateCamera("Camera", 3, 0, .7, BABYLON.Vector3.Zero(), scene);
var camera = new BABYLON.ArcRotateCamera("Camera", -(Math.PI/2), Math.PI/2, .5, BABYLON.Vector3.Zero(), scene);
// camera.panningAxis = new BABYLON.Vector3(0, 1, 0);
camera.attachControl(canvas, false);
BABYLON.SceneLoader.ImportMesh("" , "https://dl.dropboxusercontent.com/s/n4gwsdn9en6pi86/", "test_ms_simple.obj", scene, function (newMeshes) {
camera.target = BABYLON.Vector3.Zero();
// var mesh = newMeshes[0].getChildMeshes()[0];
var mesh = newMeshes[0];
mesh.showBoundingBox = true;
mesh.position.x = .1;
mesh.position.y = .46;
mesh.position.z = 0;
mesh.setPivotPoint(mesh.getBoundingInfo().boundingBox.center);
mesh.rotate(BABYLON.Axis.Y, -(Math.PI / 2), BABYLON.Space.WORLD);
mesh.rotate(BABYLON.Axis.X, -(Math.PI / 2), BABYLON.Space.WORLD);
camera.minZ = 0;
camera.wheelPrecision = 500;
});
// Move the light with the camera
scene.registerBeforeRender(function () {
light.position = camera.position;
});
// showAxis(10);
return scene;
}
var scene = createScene(); //Call the createScene function
// Register a render loop to repeatedly render the scene
engine.runRenderLoop(function () {
scene.render();
});
// Watch for browser/canvas resize events
window.addEventListener("resize", function () {
engine.resize();
});
function showAxis(size) {
var makeTextPlane = function(text, color, size) {
var dynamicTexture = new BABYLON.DynamicTexture("DynamicTexture", 50, scene, true);
dynamicTexture.hasAlpha = true;
dynamicTexture.drawText(text, 5, 40, "bold 36px Arial", color , "transparent", true);
var plane = BABYLON.Mesh.CreatePlane("TextPlane", size, scene, true);
plane.material = new BABYLON.StandardMaterial("TextPlaneMaterial", scene);
plane.material.backFaceCulling = false;
plane.material.specularColor = new BABYLON.Color3(0, 0, 0);
plane.material.diffuseTexture = dynamicTexture;
return plane;
};
var axisX = BABYLON.Mesh.CreateLines("axisX", [
BABYLON.Vector3.Zero(), new BABYLON.Vector3(size, 0, 0), new BABYLON.Vector3(size * 0.95, 0.05 * size, 0),
new BABYLON.Vector3(size, 0, 0), new BABYLON.Vector3(size * 0.95, -0.05 * size, 0)
], scene);
axisX.color = new BABYLON.Color3(1, 0, 0);
var xChar = makeTextPlane("X", "red", size / 10);
xChar.position = new BABYLON.Vector3(0.9 * size, -0.05 * size, 0);
var axisY = BABYLON.Mesh.CreateLines("axisY", [
BABYLON.Vector3.Zero(), new BABYLON.Vector3(0, size, 0), new BABYLON.Vector3( -0.05 * size, size * 0.95, 0),
new BABYLON.Vector3(0, size, 0), new BABYLON.Vector3( 0.05 * size, size * 0.95, 0)
], scene);
axisY.color = new BABYLON.Color3(0, 1, 0);
var yChar = makeTextPlane("Y", "green", size / 10);
yChar.position = new BABYLON.Vector3(0, 0.9 * size, -0.05 * size);
var axisZ = BABYLON.Mesh.CreateLines("axisZ", [
BABYLON.Vector3.Zero(), new BABYLON.Vector3(0, 0, size), new BABYLON.Vector3( 0 , -0.05 * size, size * 0.95),
new BABYLON.Vector3(0, 0, size), new BABYLON.Vector3( 0, 0.05 * size, size * 0.95)
], scene);
axisZ.color = new BABYLON.Color3(0, 0, 1);
var zChar = makeTextPlane("Z", "blue", size / 10);
zChar.position = new BABYLON.Vector3(0, 0.05 * size, 0.9 * size);
};
<script src="https://cdn.babylonjs.com/babylon.js"></script>
<script src="https://preview.babylonjs.com/loaders/babylon.objFileLoader.min.js"></script>
<canvas id="renderCanvas" width=350 height=350>
I am having some trouble taking a screenshot. If you followed along with the tut, at: http://doc.babylonjs.com/tutorials/render_scene_on_a_png you see that they only provided one line which is BABYLON.Tools.CreateScreenshot(engine, camera, size);
With size and your camera being the variables that you can change. When I implemented this, I would get a black screenshot. I first thought that maybe the it was taking a screenshot before the page rendered so I added a simple loop to and added an alert box to wait until the scene loaded before the screenshot would execute. But for some reason I am still getting a black screenshot.
Thank you for your input :D
var canvas = document.querySelector("#renderCanvas");
var engine = new BABYLON.Engine(canvas, true);
//Needed for the CreateScene Function
var createScene = function () {
var scene = new BABYLON.Scene(engine);
// Setup camera
var camera = new BABYLON.ArcRotateCamera("Camera", 0, 10, 0, BABYLON.Vector3.Zero(), scene);
camera.setPosition(new BABYLON.Vector3(-10, 10, 25));
camera.attachControl(canvas, true);
// Lights
var light0 = new BABYLON.PointLight("Omni0", new BABYLON.Vector3(0, 10, 5), scene);
var light1 = new BABYLON.PointLight("Omni1", new BABYLON.Vector3(0, -10, 5), scene);
var light2 = new BABYLON.PointLight("Omni2", new BABYLON.Vector3(10, 0, 5), scene);
var light3 = new BABYLON.DirectionalLight("Dir0", new BABYLON.Vector3(1, -1, 2), scene);
var light4 = new BABYLON.SpotLight("Spot0", new BABYLON.Vector3(0, 5, -10), new BABYLON.Vector3(0, -1, 0), 0.8, 3, scene);
var light5 = new BABYLON.HemisphericLight("Hemi0", new BABYLON.Vector3(0, 1, 0), scene);
var material = new BABYLON.StandardMaterial("kosh", scene);
var sphere = BABYLON.Mesh.CreateSphere("Sphere", 16, 3, scene);
var cylinder = BABYLON.Mesh.CreateCylinder("cylinder", 7.5, 3, 6, 6, 1, scene);
var box = BABYLON.Mesh.CreateBox("box", 6.0, scene);
// Creating light sphere
var lightSphere0 = BABYLON.Mesh.CreateSphere("Sphere0", 16, .5, scene);
var lightSphere1 = BABYLON.Mesh.CreateSphere("Sphere1", 16, 0.5, scene);
var lightSphere2 = BABYLON.Mesh.CreateSphere("Sphere2", 16, 0.5, scene);
//Shifting position up of Sphere
sphere.position.y = 5;
box.position.y = -2;
//generating shadows
var shadowGenerator = new BABYLON.ShadowGenerator(1024, light3);
shadowGenerator.getShadowMap().renderList.push(box);
shadowGenerator.getShadowMap().renderList.push(sphere);
shadowGenerator.getShadowMap().renderList.push(cylinder);
//Colors
lightSphere0.material = new BABYLON.StandardMaterial("red", scene);
lightSphere0.material.diffuseColor = new BABYLON.Color3(0, 0, 0);
lightSphere0.material.specularColor = new BABYLON.Color3(0, 0, 0);
lightSphere0.material.emissiveColor = new BABYLON.Color3(1, 0, 0);
lightSphere1.material = new BABYLON.StandardMaterial("green", scene);
lightSphere1.material.diffuseColor = new BABYLON.Color3(0, 0, 0);
lightSphere1.material.specularColor = new BABYLON.Color3(0, 0, 0);
lightSphere1.material.emissiveColor = new BABYLON.Color3(0, 1, 0);
lightSphere2.material = new BABYLON.StandardMaterial("blue", scene);
lightSphere2.material.diffuseColor = new BABYLON.Color3(0, 0, 0);
lightSphere2.material.specularColor = new BABYLON.Color3(0, 0, 0);
lightSphere2.material.emissiveColor = new BABYLON.Color3(0, 0, 1);
// Sphere material
material.diffuseColor = new BABYLON.Color3(1, 1, 1);
sphere.material = material;
// Lights colors
light0.diffuse = new BABYLON.Color3(1, 0, 0);
light0.specular = new BABYLON.Color3(1, 0, 0);
light1.diffuse = new BABYLON.Color3(0, 1, 0);
light1.specular = new BABYLON.Color3(0, 1, 0);
light2.diffuse = new BABYLON.Color3(0, 0, 1);
light2.specular = new BABYLON.Color3(0, 0, 1);
light3.diffuse = new BABYLON.Color3(1, 1, 1);
light3.specular = new BABYLON.Color3(1, 1, 1);
light4.diffuse = new BABYLON.Color3(1, 0, 0);
light4.specular = new BABYLON.Color3(1, 1, 1);
light5.diffuse = new BABYLON.Color3(1, 1, 1);
light5.specular = new BABYLON.Color3(1, 1, 1);
light5.groundColor = new BABYLON.Color3(0, 0, 0);
//Adding the SkyBox
var skybox = BABYLON.Mesh.CreateBox("skyBox", 100.0, scene);
var skyboxMaterial = new BABYLON.StandardMaterial("skyBox", scene);
skyboxMaterial.backFaceCulling = false;
skyboxMaterial.reflectionTexture = new BABYLON.CubeTexture("../textures/TropicalSunnyDay", scene);
skyboxMaterial.reflectionTexture.coordinatesMode = BABYLON.Texture.SKYBOX_MODE;
skyboxMaterial.diffuseColor = new BABYLON.Color3(0, 0, 0);
skyboxMaterial.specularColor = new BABYLON.Color3(0, 0, 0);
skyboxMaterial.disableLighting = true;
skybox.material = skyboxMaterial;
// Animations
var alpha = 0;
scene.beforeRender = function () {
light0.position = new BABYLON.Vector3(10 * Math.sin(alpha), 0, 10 * Math.cos(alpha));
light1.position = new BABYLON.Vector3(10 * Math.sin(alpha), 0, -10 * Math.cos(alpha));
light2.position = new BABYLON.Vector3(10 * Math.cos(alpha), 0, 10 * Math.sin(alpha));
lightSphere0.position = light0.position;
lightSphere1.position = light1.position;
lightSphere2.position = light2.position;
lightSphere0.position.y = 5;
lightSphere1.position.y = 5;
lightSphere2.position.y = 5;
alpha += 0.01;
};
//ground
var ground = BABYLON.Mesh.CreateGround("ground1", 100, 100, 2, scene);
ground.receiveShadows = true;
var materialGround = new BABYLON.StandardMaterial("grassTexture", scene);
materialGround.diffuseColor = new BABYLON.Color3(1,1,1);
materialGround.diffuseTexture = new
BABYLON.Texture("../textures/grass.png",scene);
ground.material = materialGround;
//wait loop for the screenshot
size = { width: 600, height: 400};
var i = 1;
function myLoop () {
setTimeout(function () {
alert('Taking Screenshot!');
//Creating png screenshot
BABYLON.Tools.CreateScreenshot(engine, camera, size);
i++;
if (i < 1) {
myLoop();
}
}, 2000)
}
myLoop();
//Returning the scene
return scene;
};
var scene = createScene();
engine.runRenderLoop(function () {
scene.render();
});
window.addEventListener("resize", function () {
engine.resize();
});
The cool fellow (DeltaKosh) over at htmlgameDevs helped me out. He said that when you are creating an engine for a Screenshot or rendering a PNG file that you must define it this way:
engine = new BABYLON.Engine(canvas, true, { preserveDrawingBuffer: true, stencil: true });
I also added a loop that waited a second until after the scene renders to take the screenshot
var scene = createScene();
var booleanR = false;
var size = 512;
engine.runRenderLoop(function () {
scene.render();
});
function myLoop () {
setTimeout(function () {
if(booleanR == false){
BABYLON.Tools.CreateScreenshot(engine, camera, size);
booleanR = true;
}
}, 1000)
}
This is the link from his response: http://www.html5gamedevs.com/topic/32765-getting-a-black-screenshot-with-babylonjs/?tab=comments#comment-187819
val playTexture = assetManager?.get(A.image.gamePlayBtn, Texture::class.java)
val skin: Skin = Skin()
skin.add("up", TextureRegion(playTexture, 0, 0, 296, 96))
skin.add("down", TextureRegion(playTexture, 0, 96, 296, 96))
val playButton: ImageTextButton = ImageTextButton("PLAY THE GAME", with(ImageTextButton.ImageTextButtonStyle()) {
up = skin.getDrawable("up")
down = skin.getDrawable("down")
font = BitmapFont()
font.data.setScale(3f)
font.color = Color.ORANGE
this
})
OnClick events work ok, but there is no button background change for onClicked state(down). Where I'm wrong?
I've tested your code, that's working fine. Added complete text code :
class Main : ApplicationAdapter(){
internal lateinit var stage: Stage
override fun create() {
stage= Stage()
stage.setDebugAll(true)
Gdx.input.setInputProcessor(stage)
var skin= Skin()
var tex1 =Texture("badlogic.jpg")
skin.add("up", TextureRegion(tex1, 0, 0, 100, 50))
skin.add("down", TextureRegion(tex1, 0, 96, 100, 50))
var playButton: ImageTextButton = ImageTextButton("Play The Game", with(ImageTextButton.ImageTextButtonStyle()){
up = skin.getDrawable("up")
down = skin.getDrawable("down")
font = BitmapFont()
font.data.setScale(3f)
font.color = Color.ORANGE
this
});
playButton.setPosition(0F,100F)
playButton.addListener(object : ClickListener(){
override fun clicked(event: InputEvent?, x: Float, y: Float) {
print("clicked")
super.clicked(event, x, y)
}
})
stage.addActor(playButton)
}
override fun render() {
Gdx.gl.glClearColor(1f, 0f, 0f, 1f)
Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT)
stage.draw()
stage.act()
}
}
You have to update your button.
There is updateImage() function, but its protected so u have to do it using Stage.
So here is what u do:
Create stage.
Add your button to stage.
Call stage.draw() in render function.
...
Stage stage = new Stage();
//create button
stage.addActor(playButton);
...
#Override
public void render() {
stage.draw();
}
I am trying to change color of destination waypoint to green from red. Currently following the code from example:
Google waypoints
I googled, but could not find answer.
Many thanks in advance.
I'm afraid you can't.
What you can do is pass the google.maps.DirectionsRenderer an options object to disable markers altogether
var DirectionsRenderer= new google.maps.DirectionsRenderer({map:map, suppressMarkers: true});
and then add your custom markers yourself using the location of the origin and destination that you passed to the google.maps.DirectionsService instance.
proof of concept fiddle
// global variables to keep the start and end locations
var startLocation = {};
var endLocation = {};
Parse the directions response, putting a custom marker at the start and end of the route
var request = {
origin: start,
destination: end,
waypoints: waypts,
optimizeWaypoints: true,
travelMode: google.maps.TravelMode.DRIVING
};
directionsService.route(request, function (response, status) {
if (status == google.maps.DirectionsStatus.OK) {
directionsDisplay.setDirections(response);
var route = response.routes[0];
var summaryPanel = document.getElementById('directions_panel');
summaryPanel.innerHTML = '';
// For each route, display summary information.
for (var i = 0; i < route.legs.length; i++) {
var routeSegment = i + 1;
summaryPanel.innerHTML += '<b>Route Segment: ' + routeSegment + '</b><br>';
summaryPanel.innerHTML += route.legs[i].start_address + ' to ';
summaryPanel.innerHTML += route.legs[i].end_address + '<br>';
summaryPanel.innerHTML += route.legs[i].distance.text + '<br><br>';
}
var path = response.routes[0].overview_path;
var legs = response.routes[0].legs;
for (i = 0; i < legs.length; i++) {
if (i == 0) {
startLocation.latlng = legs[i].start_location;
startLocation.address = legs[i].start_address;
createMarker(legs[i].start_location, "start", legs[i].start_address, "green");
}
endLocation.latlng = legs[i].end_location;
endLocation.address = legs[i].end_address;
}
}
createMarker(endLocation.latlng, "end", endLocation.address, "red");
custom marker functions (you can simplify this if you only need 2 markers):
var icons = [];
icons["red"] = {
url: 'http://maps.google.com/mapfiles/ms/micons/red.png',
// This marker is 34 pixels wide by 34 pixels tall.
size: new google.maps.Size(34, 34),
// The origin for this image is 0,0.
origin: new google.maps.Point(0, 0),
// The anchor for this image is at 9,34.
anchor: new google.maps.Point(17, 34)
};
function getMarkerImage(iconColor) {
if ((typeof (iconColor) == "undefined") || (iconColor == null)) {
iconColor = "red";
}
if (!icons[iconColor]) {
icons[iconColor] = {
url: "http://maps.google.com/mapfiles/ms/micons/" + iconColor + ".png",
// This marker is 34 pixels wide by 34 pixels tall.
size: new google.maps.Size(34, 34),
// The origin for this image is 0,0.
origin: new google.maps.Point(0, 0),
// The anchor for this image is at 6,20.
anchor: new google.maps.Point(17, 34)
};
}
return icons[iconColor];
}
// Marker sizes are expressed as a Size of X,Y
// where the origin of the image (0,0) is located
// in the top left of the image.
// Origins, anchor positions and coordinates of the marker
// increase in the X direction to the right and in
// the Y direction down.
var iconImage = {
url: 'http://maps.google.com/mapfiles/ms/micons/red.png',
// This marker is 20 pixels wide by 34 pixels tall.
size: new google.maps.Size(20, 34),
// The origin for this image is 0,0.
origin: new google.maps.Point(0, 0),
// The anchor for this image is at 9,34.
anchor: new google.maps.Point(9, 34)
};
// Shapes define the clickable region of the icon.
// The type defines an HTML <area> element 'poly' which
// traces out a polygon as a series of X,Y points. The final
// coordinate closes the poly by connecting to the first
// coordinate.
var iconShape = {
coord: [9, 0, 6, 1, 4, 2, 2, 4, 0, 8, 0, 12, 1, 14, 2, 16, 5, 19, 7, 23, 8, 26, 9, 30, 9, 34, 11, 34, 11, 30, 12, 26, 13, 24, 14, 21, 16, 18, 18, 16, 20, 12, 20, 8, 18, 4, 16, 2, 15, 1, 13, 0],
type: 'poly'
};
var infowindow = new google.maps.InfoWindow({
size: new google.maps.Size(150, 50)
});
function createMarker(latlng, label, html, color) {
var contentString = '<b>' + label + '</b><br>' + html;
var marker = new google.maps.Marker({
position: latlng,
map: map,
icon: getMarkerImage(color),
shape: iconShape,
title: label,
zIndex: Math.round(latlng.lat() * -100000) << 5
});
marker.myname = label;
gmarkers.push(marker);
google.maps.event.addListener(marker, 'click', function () {
infowindow.setContent(contentString);
infowindow.open(map, marker);
});
}
I've added an header and a footer on my document by PdfPageEventHelper.
The document has several "large" tables populated at runtime.
I've tried to add those tables simply by "documen.Add(table)", but my header and my footer results overwritten.
I've already tried both methods to add the tables (WriteSelectedRows and document.Add(myPdfPtable).
Here is the code of the PageEventHelper:
private class MyPageEventHandler : PdfPageEventHelper
{
public iTextSharp.text.Image ImageHeader { get; set; }
public iTextSharp.text.Image ImageFooter { get; set; }
public override void OnEndPage(PdfWriter writer, Document document)
{
var fontintestazione = FontFactory.GetFont("Verdana", 10, Font.BOLD, BaseColor.LIGHT_GRAY);
var fontRight = FontFactory.GetFont("Verdana", 8, Font.BOLD, BaseColor.WHITE);
var fontFooter = FontFactory.GetFont("Verdana", 6, Font.NORMAL, BaseColor.BLUE);
float cellHeight = document.TopMargin;
Rectangle page = document.PageSize;
PdfPTable head = new PdfPTable(3);
head.TotalWidth = page.Width;
PdfPCell c = new PdfPCell(ImageHeader, true);
c.HorizontalAlignment = Element.ALIGN_LEFT;
c.FixedHeight = cellHeight;
c.Border = PdfPCell.NO_BORDER;
head.AddCell(c);
c = new PdfPCell(new Phrase("somePhrase", fontintestazione));
c.Border = PdfPCell.NO_BORDER;
head.AddCell(c);
c = new PdfPCell(new Phrase("someTextBlah", fontRight));
c.Border = PdfPCell.NO_BORDER;
c.HorizontalAlignment = 1;
c.BackgroundColor = new BaseColor(70, 130, 180);
head.AddCell(c);
head.WriteSelectedRows(0, -1, 10, page.Height - cellHeight + head.TotalHeight -30, writer.DirectContent);
PdfPTable footer = new PdfPTable(2);
footer.TotalWidth = 316f;
float[] cfWidths = new float[] { 2f, 1f };
footer.SetWidths(cfWidths);
PdfPCell cf = new PdfPCell(ImageFooter, true);
cf.HorizontalAlignment = Element.ALIGN_RIGHT;
cf.FixedHeight = cellHeight;
cf.Border = PdfPCell.NO_BORDER;
footer.AddCell(cf);
cf = new PdfPCell(new Phrase("someEndingText", fontFooter));
cf.HorizontalAlignment = Element.ALIGN_LEFT;
cf.Border = PdfPCell.NO_BORDER;
footer.AddCell(cf);
footer.WriteSelectedRows(0, -1, 10, 50, writer.DirectContent);
}
On my page, i simply do:
var document = new Document(PageSize.A4);
var output = new MemoryStream();
var writer = PdfWriter.GetInstance(document, output);
iTextSharp.text.Image imageHeader = iTextSharp.text.Image.GetInstance(Server.MapPath("/images/header.ong"));
iTextSharp.text.Image imageFooter = iTextSharp.text.Image.GetInstance(Server.MapPath("/images/footer.png"));
MyPageEventHandler eve = new MyPageEventHandler
{
ImageHeader = imageHeader ,
ImageFooter = imageFooter
};
writer.PageEvent = eve;
document.Open();
//adding a table
PdfPTable cvTable = new PdfPtable(3);
cvTable.TotalWidth = document.PageSize.Width;
PdfPCell hCell = new PdfPCell(new Phrase("Jobs By User", aCustomFont));
cvTable.AddCell(hCell);
for(int i = 0; i < myTable.Records.Count; i++)
{
PdfPCell idCell = new PdfPCell(new Phrase(myTable.Records[i]._id, aFont));
cvTable.Add(idCell);
//same stuff for other fields of table
}
//first attempt.... failed:
document.Add(cvTable) //<- header and footer are overwritten by table
//second attempt..... failed too...
cvTable.WriteSelectedRows(0, -1, 10, myPoisition, writer.DirectContent);
//kind of fail...:
//the table is large and need more pages. It is trunked on the first page and overwrite
//the footer.
In your OnEndPage method you have this line:
head.WriteSelectedRows(0, -1, 10, page.Height - cellHeight + head.TotalHeight - 30, writer.DirectContent);
That code correctly calculates where to put content based on the page's height and top margin but also includes a magical 30 in there which is causing the header to be drawn on top of the table. Change it to this and your header will be fine.
head.WriteSelectedRows(0, -1, 10, page.Height - cellHeight + head.TotalHeight, writer.DirectContent);
I'm guessing that that 30 is trying to include some padding between your header and the table itself. What I would recommend is actually changing the document's margins themselves in the main code:
document.SetMargins(document.LeftMargin, document.RightMargin, document.TopMargin + 30, document.BottomMargin);
And then accounting for that in the OnEndPage method:
float cellHeight = document.TopMargin - 30;
Your footer code doesn't actually account for the bottom margin and just draws it at 50 so this will always overlap. The quick fix would be to change it to:
footer.WriteSelectedRows(0, -1, 10, footer.TotalHeight, writer.DirectContent);
This will at least get the footer bottom-aligned. If you want some more padding like above just adjust the document margins again:
document.SetMargins(document.LeftMargin, document.RightMargin, document.TopMargin + 30, document.BottomMargin + 30);