public static uint GetTextureId(string name)
{
if (_componentSamplers.TryGetValue(name.ToLowerInvariant(), out IntPtr ptrTexture))
{
return(Rhino7NativeMethods.RhTexture2dHandle(ptrTexture));
}
return(0);
}
public static List <BuiltIn> GetUniformBuiltIns()
{
if (_uniformBuiltins == null)
{
// "Start stime" is now based on when the shader was last compiled. Setting it here does not allow
// for time based shaders to "start over" if/when they're based on overall frame time/counts.
// Resetting the start time here, means that time continues to ellapse even when the shader isn't
// running. Until we have a way to start and stop a shader at a given point, allow for edits, and
// then continue, picking up where we left off...this is the only "easy" way of doing this for now.
//_startTime = DateTime.Now;
Register("_colorBuffer", "sampler2D", "texture representing the color information in the viewport before any shader components have executed", (location, display) =>
{
IntPtr texture2dPtr = PerFrameCache.InitialColorBuffer;
uint textureId = 0;
textureId = Rhino7NativeMethods.RhTexture2dHandle(texture2dPtr);
const int textureUnit = (int)SamplerTextureUnit.InitialColorBuffer;
OpenGL.glUniform1i(location, textureUnit);
OpenGL.glActiveTexture(OpenGL.GL_TEXTURE0 + (uint)textureUnit);
OpenGL.glBindTexture(OpenGL.GL_TEXTURE_2D, textureId);
OpenGL.glActiveTexture(OpenGL.GL_TEXTURE0);
});
Register("_depthBuffer", "sampler2D", "texture representing the depth information in the viewport before any shader components have executed", (location, display) =>
{
IntPtr texture2dPtr = PerFrameCache.InitialDepthBuffer;
uint textureId = 0;
textureId = Rhino7NativeMethods.RhTexture2dHandle(texture2dPtr);
const int textureUnit = (int)SamplerTextureUnit.InitialDepthBuffer;
OpenGL.glUniform1i(location, textureUnit);
OpenGL.glActiveTexture(OpenGL.GL_TEXTURE0 + (uint)textureUnit);
OpenGL.glBindTexture(OpenGL.GL_TEXTURE_2D, textureId);
OpenGL.glActiveTexture(OpenGL.GL_TEXTURE0);
});
Register("_worldToClip", "mat4", "transformation from world to clipping coordinates", (location, display) =>
{
float[] w2c = display.GetOpenGLWorldToClip(true);
OpenGL.glUniformMatrix4fv(location, 1, false, w2c);
});
Register("_viewportSize", "vec2", "width and height of viewport in pixels", (location, display) =>
{
var viewportSize = display.Viewport.Size;
OpenGL.glUniform2f(location, (float)viewportSize.Width, (float)viewportSize.Height);
});
Register("_frameSize", "vec2", "width and height of overall rendered frame in pixels", (location, display) =>
{
var frameSize = display.FrameSize;
OpenGL.glUniform2f(location, (float)frameSize.Width, (float)frameSize.Height);
});
Register("_mousePosition", "vec2", "current mouse postion", (location, display) =>
{
var mouse = display.Viewport.ParentView.ScreenToClient(System.Windows.Forms.Control.MousePosition);
mouse.Y = display.Viewport.Size.Height - mouse.Y - 1;
OpenGL.glUniform2f(location, mouse.X, mouse.Y);
});
Register("_mouseDownPosition", "vec2", "current mouse postion", (location, display) =>
{
if (MouseDownPosition == null)
{
MouseDownPosition = new System.Drawing.Point(-1, -1);
}
if (System.Windows.Forms.Control.MouseButtons == System.Windows.Forms.MouseButtons.None)
{
// No mouse button is being pressed...reset the "down" position to reflect that...
var mdp = MouseDownPosition;
mdp.X = mdp.Y = -1;
MouseDownPosition = mdp;
}
// If the "down" position hasn't been set yet, set it to the current mouse position...
if (MouseDownPosition.X == -1 && MouseDownPosition.Y == -1)
{
// Note: Mouse down position is stored in screen coordinates and translated to
// client coordinates prior to sending it to the shader... This is done
// so that a mouse down in one viewport doesn't confuse the shader running
// in another viewport.
MouseDownPosition = System.Windows.Forms.Control.MousePosition;
}
var mouse = display.Viewport.ParentView.ScreenToClient(MouseDownPosition);
mouse.Y = display.Viewport.Size.Height - mouse.Y - 1;
OpenGL.glUniform2f(location, mouse.X, mouse.Y);
});
Register("_mouseState", "ivec3", "current mouse postion and button state", (location, display) =>
{
bool lmb = System.Windows.Forms.Control.MouseButtons == System.Windows.Forms.MouseButtons.Left;
bool rmb = System.Windows.Forms.Control.MouseButtons == System.Windows.Forms.MouseButtons.Right;
bool mmb = System.Windows.Forms.Control.MouseButtons == System.Windows.Forms.MouseButtons.Middle;
OpenGL.glUniform3i(location, lmb?1:0, mmb?1:0, rmb?1:0);
});
Register("_worldToCamera", "mat4", "transformation from world to camera coordinates", (location, display) =>
{
float[] w2c = display.GetOpenGLWorldToCamera(true);
OpenGL.glUniformMatrix4fv(location, 1, false, w2c);
});
Register("_worldToCameraNormal", "mat3", "transformation to apply to normals for world to camera", (location, display) =>
{
var xf = display.Viewport.GetTransform(Rhino.DocObjects.CoordinateSystem.World, Rhino.DocObjects.CoordinateSystem.Camera);
xf = xf.Transpose();
Rhino.Geometry.Transform m;
xf.TryGetInverse(out m);
m = m.Transpose();
float[] w2cn = new float[] { (float)m.M00, (float)m.M01, (float)m.M02,
(float)m.M10, (float)m.M11, (float)m.M12,
(float)m.M20, (float)m.M21, (float)m.M22 };
OpenGL.glUniformMatrix3fv(location, 1, false, w2cn);
});
Register("_worldToScreen", "mat4", "transformation from world to screen coordinates. Screen origin is upper left", (location, display) =>
{
var m = display.Viewport.GetTransform(Rhino.DocObjects.CoordinateSystem.World, Rhino.DocObjects.CoordinateSystem.Screen);
m = m.Transpose();
float[] w2s = new float[] { (float)m.M00, (float)m.M01, (float)m.M02, (float)m.M03,
(float)m.M10, (float)m.M11, (float)m.M12, (float)m.M13,
(float)m.M20, (float)m.M21, (float)m.M22, (float)m.M23,
(float)m.M30, (float)m.M31, (float)m.M32, (float)m.M33 };
// flip z
w2s[2] = -w2s[2];
w2s[6] = -w2s[6];
w2s[10] = -w2s[10];
w2s[14] = -w2s[14];
OpenGL.glUniformMatrix4fv(location, 1, false, w2s);
});
Register("_cameraToClip", "mat4", "transformation from camera to clipping coordinates", (location, display) =>
{
float[] c2c = display.GetOpenGLCameraToClip();
OpenGL.glUniformMatrix4fv(location, 1, false, c2c);
});
Register("_time", "float", "total elapsed seconds since starting GL Component", (location, display) =>
{
var span = DateTime.Now - _startTime;
double seconds = span.TotalSeconds;
OpenGL.glUniform1f(location, (float)seconds);
});
Register("_date", "vec4", "year, month, day, time in seconds", (location, display) =>
{
var date = DateTime.Now;
OpenGL.glUniform4f(location, (float)date.Year, (float)date.Month, (float)date.Day, (float)date.TimeOfDay.TotalSeconds);
});
Register("_timeDelta", "float", "seconds since the last time this view was drawn", (location, display) =>
{
if (_drawTimes == null)
{
_drawTimes = new Dictionary <uint, DateTime>();
}
uint viewSerialNumber = display.Viewport.ParentView.RuntimeSerialNumber;
DateTime previousTime;
double seconds = 0;
if (_drawTimes.TryGetValue(viewSerialNumber, out previousTime))
{
var span = DateTime.Now - previousTime;
seconds = span.TotalSeconds;
}
_drawTimes[viewSerialNumber] = DateTime.Now;
OpenGL.glUniform1f(location, (float)seconds);
});
Register("_cameraLocation", "vec3", "world location of camera", (location, display) =>
{
var camLoc = display.Viewport.CameraLocation;
OpenGL.glUniform3f(location, (float)camLoc.X, (float)camLoc.Y, (float)camLoc.Z);
});
Register("_cameraNear", "float", "near clip plane distance in camera coordinates", (location, display) =>
{
display.Viewport.GetFrustum(out double l, out double r, out double b, out double t, out double near, out double far);
OpenGL.glUniform1f(location, (float)near);
});
Register("_cameraFar", "float", "farclip plane distance in camera coordinates", (location, display) =>
{
display.Viewport.GetFrustum(out double l, out double r, out double b, out double t, out double near, out double far);
OpenGL.glUniform1f(location, (float)far);
});
Register("_parallelViewport", "int", "1 if viewport has a parallel projection. 0 if perspective", (location, display) =>
{
int parallel = display.Viewport.IsParallelProjection ? 1:0;
OpenGL.glUniform1i(location, parallel);
});
const int maxlights = 4;
Register("_lightCount", "int", "number of lights in the scene", (location, display) =>
{
// Use reflection until 6.3 goes to release candidate. GetLights is not available until 6.3
//var lights = display.GetLights();
var lights = GetLightsHelper(display);
int count = lights.Length < maxlights ? lights.Length : 4;
OpenGL.glUniform1i(location, count);
});
Register($"_lightPosition[{maxlights}]", "vec3", "array of four light positions", (location, display) =>
{
// Use reflection until 6.3 goes to release candidate. GetLights is not available until 6.3
//var lights = display.GetLights();
var lights = GetLightsHelper(display);
float[] v = new float[3 * maxlights];
for (int i = 0; i < lights.Length; i++)
{
if (i >= maxlights)
{
break;
}
var loc = lights[i].Location;
v[i * 3] = (float)loc.X;
v[i * 3 + 1] = (float)loc.Y;
v[i * 3 + 2] = (float)loc.Z;
}
OpenGL.glUniform3fv(location, maxlights, v);
});
Register($"_lightDirection[{maxlights}]", "vec3", "array of four light direction vectors", (location, display) =>
{
// Use reflection until 6.3 goes to release candidate. GetLights is not available until 6.3
//var lights = display.GetLights();
var lights = GetLightsHelper(display);
float[] v = new float[3 * maxlights];
for (int i = 0; i < lights.Length; i++)
{
if (i >= maxlights)
{
break;
}
var direction = lights[i].Direction;
v[i * 3] = (float)direction.X;
v[i * 3 + 1] = (float)direction.Y;
v[i * 3 + 2] = (float)direction.Z;
}
OpenGL.glUniform3fv(location, maxlights, v);
});
Register($"_lightInCameraSpace[{maxlights}]", "vec3", "array of four light posiitons in camera space", (location, display) =>
{
// Use reflection until 6.3 goes to release candidate. GetLights is not available until 6.3
//var lights = display.GetLights();
var lights = GetLightsHelper(display);
int[] v = new int[maxlights];
for (int i = 0; i < lights.Length; i++)
{
if (i >= maxlights)
{
break;
}
bool isCameraLight = lights[i].CoordinateSystem == Rhino.DocObjects.CoordinateSystem.Camera;
v[i] = isCameraLight ? 1 : 0;
}
OpenGL.glUniform1iv(location, maxlights, v);
});
_uniformBuiltins.Sort((a, b) => (a.Name.CompareTo(b.Name)));
}
return(_uniformBuiltins);
}