/// <summary>
/// Constructor
/// </summary>
/// <param name="tesselation">Tesselation amount</param>
/// <param name="amplitude">Amplitude of sinewave</param>
/// <param name="repeats">Repeats across object</param>
/// <param name="rotate">To rotate to viewer in azimuth</param>
/// <param name="rotateelevation">to rotate to viewer in elevation</param>
/// <param name="commontransformuniform">Common transform uniform. 0 means off</param>
/// <param name="autoscale">To autoscale distance. Sets the 1.0 scale point.</param>
/// <param name="autoscalemin">Minimum to scale to</param>
/// <param name="autoscalemax">Maximum to scale to</param>
///
public GLTesselationShaderSinewaveAutoscale(float tesselation, float amplitude, float repeats, bool rotate = false, bool rotateelevation = true,
int commontransformuniform = 0, float autoscale = 0, float autoscalemin = 0.1f, float autoscalemax = 3f)
{
var vert = new GLPLVertexScaleLookat(rotate, rotateelevation, commontransformuniform, false, false, autoscale, autoscalemin, autoscalemax);
var tcs = new GLPLTesselationControl(tesselation);
tes = new GLPLTesselationEvaluateSinewave(amplitude, repeats);
var frag = new GLPLFragmentShaderTexture2DDiscard();
AddVertexTCSTESGeoFragment(vert, tcs, tes, null, frag);
}
public void CreateObjects(GLItemsList items, GLRenderProgramSortedList rObjects, GalacticMapping galmap, GLStorageBlock findbufferresults, bool depthtest)
{
this.galmap = galmap;
// first gets the images and make a 2d array texture for them
Bitmap[] images = galmap.RenderableMapTypes.Select(x => x.Image as Bitmap).ToArray();
// 256 is defined normal size
var objtex = new GLTexture2DArray(images, bmpmipmaplevels: 1, wantedmipmaplevels: 3, texturesize: new Size(256, 256), internalformat: OpenTK.Graphics.OpenGL4.SizedInternalFormat.Rgba8, alignment: ContentAlignment.BottomCenter);
IGLTexture texarray = items.Add(objtex, "GalObjTex");
// now build the shaders
const int texbindingpoint = 1;
var vert = new GLPLVertexScaleLookat(rotatetoviewer: dorotate, rotateelevation: doelevation, // a look at vertex shader
autoscale: 500, autoscalemin: 1f, autoscalemax: 20f); // below 500, 1f, above 500, scale up to 20x
var tcs = new GLPLTesselationControl(40f);
tes = new GLPLTesselationEvaluateSinewave(1f, 2f); // this uses the world position from the vertex scaler to position the image, w controls image + animation (b16)
var frag = new GLPLFragmentShaderTexture2DDiscard(texbindingpoint); // binding - takes image pos from tes. imagepos < 0 means discard
objectshader = new GLShaderPipeline(vert, tcs, tes, null, frag);
items.Add(objectshader);
objectshader.StartAction += (s, m) =>
{
texarray.Bind(texbindingpoint); // bind tex array to, matching above
};
// now the RenderControl for the objects
GLRenderState rt = GLRenderState.Patches(4);
rt.DepthTest = depthtest;
// create a quad and all entries of the renderable map objects, zero at this point, with a zero instance count. UpdateEnables will fill it in later
// but we need to give it the maximum buffer length at this point
const float objsize = 10.0f; // size of object on screen
ridisplay = GLRenderableItem.CreateVector4Vector4(items, OpenTK.Graphics.OpenGL4.PrimitiveType.Patches, rt,
GLShapeObjectFactory.CreateQuadTriStrip(objsize, objsize), // quad2 4 vertexts
new Vector4[galmap.RenderableMapObjects.Length], // world positions
ic: 0, seconddivisor: 1);
modelworldbuffer = items.LastBuffer();
int modelpos = modelworldbuffer.Positions[0];
worldpos = modelworldbuffer.Positions[1];
rObjects.Add(objectshader, "galmapobj", ridisplay);
// add a find shader to look them up
var geofind = new GLPLGeoShaderFindTriangles(findbufferresults, 16);
findshader = items.NewShaderPipeline(null, vert, tcs, tes, geofind, null, null, null);
// hook to modelworldbuffer, at modelpos and worldpos. UpdateEnables will fill in instance count
rifind = GLRenderableItem.CreateVector4Vector4(items, OpenTK.Graphics.OpenGL4.PrimitiveType.Patches, GLRenderState.Patches(4), modelworldbuffer, modelpos, ridisplay.DrawCount,
modelworldbuffer, worldpos, null, ic: 0, seconddivisor: 1);
GLStatics.Check();
// Text renderer for the labels
textrenderer = new GLBitmaps("bm-galmapobjects", rObjects, new Size(128, 40), depthtest: depthtest, cullface: false, textureformat: OpenTK.Graphics.OpenGL4.SizedInternalFormat.Rgba8);
items.Add(textrenderer);
// now make the text up for all the objects above
using (Font fnt = new Font("Arial", 8.5F))
{
using (StringFormat fmt = new StringFormat())
{
fmt.Alignment = StringAlignment.Center;
var renderablegalmapobjects = galmap.RenderableMapObjects; // list of enabled entries
List <Vector3> posset = new List <Vector3>();
float offscale = objsize * (0.5f + (float)textrenderer.BitmapSize.Height / (float)textrenderer.BitmapSize.Width / 2); // this is the nominal centre of the text bitmap, offset in Y to the object
for (int i = 0; i < renderablegalmapobjects.Length; i++)
{
var o = renderablegalmapobjects[i];
float offset = -offscale;
for (int j = 0; j < i; j++) // look up previous ones and see if we labeled it before
{
var d1 = new Vector3(o.points[0].X, o.points[0].Y + offset, o.points[0].Z);
var d2 = posset[j]; // where it was placed.
var diff = d1 - d2;
if (diff.Length < offscale) // close
{
if (offset > 0) // if offset is positive, flip below and increase again
{
offset = -offset - offscale;
}
else
{
offset *= -1; // flip over top
}
// System.Diagnostics.Debug.WriteLine($"close {renderablegalmapobjects[i].name} {d1} to {renderablegalmapobjects[j].name} {d2} {diff} select {offset}");
}
}
Vector3 pos = new Vector3(o.points[0].X, o.points[0].Y + offset, o.points[0].Z);
posset.Add(pos);
//System.Diagnostics.Debug.WriteLine($"{renderablegalmapobjects[i].name} at {pos} {offset}");
textrenderer.Add(o.id, o.name, fnt,
Color.White, Color.FromArgb(0, 255, 0, 255),
pos,
new Vector3(objsize, 0, 0), new Vector3(0, 0, 0), textformat: fmt, rotatetoviewer: dorotate, rotateelevation: doelevation,
alphafadescalar: -100, alphafadepos: 500); // fade in, alpha = 0 at >500, 1 at 400
}
}
}
UpdateEnables(); // fill in worldpos's and update instance count, taking into
}