@jjhp3

Another option worth looking at is chaining together IzzyMap mappings. I find this adds more flexibility.
I often use one projector to mask and place my mapping content. This projector is sending to a virtual stage.
Then I use Get Stage Image to grab that IzzyMap work, and feed it into a second Projector where I use IzzyMap to Grid Warp as required.
I find this 2 phase approach to be much less confusing and easier to update over time. 

Wow - thanks you! I will attempt... what a wonderful group of people work with Isadora!

@jjhp3

Ideas:

• Try using 3D
  • Get a .3ds file of a column/cylinder (You should be able to use this .3ds file (though you'll need to modify it to make it taller either using the 3D Player or, failing that, Cheetah3D)
  • Import the .3ds file into Isadora
  •  Drag it into the Scene Editor from the Media View to create a 3D Player actor
  • Connect a Movie Player with your video content to the 'texture map' input of the 3D Player actor so it wraps your video around the 3d object
  • Adjust the 3D Player actor and/or a 3D Stage Orientation actor until the content achieves the look you want on the column.

• Try having an LLM write GLSL shader code to create a "cylinder warp" effect. (If you do this, feed it the section named "Tutorial 6: Adding GLSL Shaders to the Toolbox" from this article first and the example GLSL shader codes below so that it understands how GLSL shader code works in Isadora.)

Example Code 1:

/*
TT Bulge Distortion - Fragment Shader
version v1.0
Created for Isadora by Mark Coniglio
Based on Code in GPUImage by Brad Larsen 
https://github.com/BradLarson/GPUImage
*/
// ISADORA_PLUGIN_NAME("TT Pinch Distortion")
// ISADORA_PLUGIN_DESC("Creates a 'pinch' effect centered at the point specified specified by the 'horz center' and 'vert center' inputs. You can adjust size and intensity of the pinch using the 'radius' and intensity' inputs.")
// ISADORA_FLOAT_PARAM(radius, radi, 0, 200, 100, "Radius of the pinch effect.");
uniform float radius;
// ISADORA_FLOAT_PARAM(intensity, intn, -1000.0, 1000.0, 100, "Intensity of the pinch effect.");
uniform float intensity;
// ISADORA_FLOAT_PARAM(horz_center, ctrx, -100.0, 100.0, 0, "Horizontal center of the pinch effect.");
uniform float horz_center;
// ISADORA_FLOAT_PARAM(vert_center, ctry, -100.0, 100.0, 0, "Vertical center of the pinch effect.");
uniform float vert_center;
uniform vec2 resolution;
uniform sampler2D tex0;
void main()
{
    float aspect = resolution.x / resolution.y;
    vec2 uv = gl_TexCoord[0].xy;
// normalize
uv -= vec2(0.5);
// account for aspect ratio
uv.x *= aspect;
vec2 center = vec2(horz_center / 100.0, vert_center / 100.0);
vec2 dir = normalize( center - uv );
float d = length( center - uv );
float factor = 0.5 * intensity/100.0;
float f = exp( factor * ( d - radius/200.0 ) ) - 1.0;
if (d > radius/200.0 ) f = 0.0;
 vec2 halfPixel = vec2(0.5, 0.5) / resolution.xy;
// account for aspect ratio
uv.x /= aspect;
// de-normalize
uv += vec2(0.5);
uv.x = clamp(uv.x, 0.0 + halfPixel.x, 1.0 - halfPixel.x);
uv.y = clamp(uv.y, 0.0 + halfPixel.y, 1.0 - halfPixel.y);
gl_FragColor = texture2D(tex0, uv + f * dir );

}

Example Code 2:

/*

TT Bulge Distortion - Fragment Shader

version v1.0

Created for Isadora by Mark Coniglio

Based on Code in GPUImage by Brad Larsen

https://github.com/BradLarson/GPUImage

*/

// ISADORA_PLUGIN_NAME("TT Pinch Distortion")

// ISADORA_PLUGIN_DESC("Creates a 'pinch' effect centered at the point specified specified by the 'horz center' and 'vert center' inputs. You can adjust size and intensity of the pinch using the 'radius' and intensity' inputs.")

// ISADORA_FLOAT_PARAM(radius, radi, 0, 200, 100, "Radius of the pinch effect.");

uniform float radius;

// ISADORA_FLOAT_PARAM(intensity, intn, -1000.0, 1000.0, 100, "Intensity of the pinch effect.");

uniform float intensity;

// ISADORA_FLOAT_PARAM(horz_center, ctrx, -100.0, 100.0, 0, "Horizontal center of the pinch effect.");

uniform float horz_center;

// ISADORA_FLOAT_PARAM(vert_center, ctry, -100.0, 100.0, 0, "Vertical center of the pinch effect.");

uniform float vert_center;

uniform vec2 resolution;

uniform sampler2D tex0;

void main()

{

float aspect = resolution.x / resolution.y;

vec2 uv = gl_TexCoord[0].xy;

// normalize
uv -= vec2(0.5);
// account for aspect ratio
uv.x *= aspect;
vec2 center = vec2(horz_center / 100.0, vert_center / 100.0);
vec2 dir = normalize( center - uv );
float d = length( center - uv );
float factor = 0.5 * intensity/100.0;
float f = exp( factor * ( d - radius/200.0 ) ) - 1.0;
if (d > radius/200.0 ) f = 0.0;
 vec2 halfPixel = vec2(0.5, 0.5) / resolution.xy;
// account for aspect ratio
uv.x /= aspect;
// de-normalize
uv += vec2(0.5);
uv.x = clamp(uv.x, 0.0 + halfPixel.x, 1.0 - halfPixel.x);
uv.y = clamp(uv.y, 0.0 + halfPixel.y, 1.0 - halfPixel.y);
gl_FragColor = texture2D(tex0, uv + f * dir );

}

Hi All - I have done lots of mapping in my time, but now I'm stuck. I'm projecting a thin vertical video of water/waves onto a 600 cm diameter vertical column using a short throw projector. Using IzzyMap of course... I want the waves more or less "level" across the column and the top and bottom of the thin video rounded to appear to wrap the column. I have used composite on the input for the rounded without luck and tried the grid setting for leveling. I have used just a few grid points thinking moving one might warp the rest of the points, but that didn't seem to work. I tried using 25 points on the long, vertical side and 4 on the horizontal and that didn't seem to work well at all. The bezier handles are so small and white, while my video is very light too. I made a dark grid image to test but I can't get that to warp the way I want it to.

Is there a way of using the grid to warp a column? For what it's worth, I have watched the guru session on mapping several times and read all there is on the Troika website on mapping too. Sorry to be dense and looking forward to any suggestions!  - John

@skuven here is the current update - Including my new aiming system. Its really shaping up!

Hi,

On Epson projectors, you need to go into the network settings, then in the "other" section, and activate PJLink ( de-activated by default ).

The other controls are using other protocols, so will work anyway.

Best,

Mehdi

@charlotte_e

I used PJLink to control my Epson projector (I currently use another method because I find PJLink more limited). I remember that even though I didn't have a password set in the projector's menu, I needed to enter the following password in the PJLink actor: @Panasonic (I saw it on a forum).

I hope this helps.

Best

Javi

@skuven

Hiya

Thank you for this.

I am no where near this level and I was doing an introductory course for some theatre students.

I was trying to get them to see beyond the linear scope of simple playback etc and the video above might have pushed them in a different direction.

cheers

eamon

@dusx Yes! That would help me considerably if its not too much trouble for you... thanks!

@eamon i will post a zipped file of everything - quite happy for you to have it. I have a new version I’d like to showcase with working aim logic