O.vertex = UnityObjectToClipPos(v.vertex) įloat lat = (uv.x) * PI2 // from 0 to 2PIįloat lon = (uv.y. Input is a mercator projection and outputs a equirectangular or azimuthal projection (choose from the dropdown menu) Shader "Unlit/NewUnlitShader 1" A useful application for this type of projection is a polar. It has the useful properties that all points on the map are at proportionally correct distances from the center point, and that all points on the map are at the correct azimuth (direction) from the center point.
GPROJECTOR TURN AZIMUTH MAP TO EQUIRECTANGLER FULL
Here is a full shader to play around with. The azimuthal equidistant projection is an azimuthal map projection. The wiki pages have a bunch of formulas to go back and forth between projections. Or you can find a formula to go directly from azimuthal -> mercator. Each data model is introduced, explained how it is. This chapter stars by describing several popular spatial data models (section 2.2 ). These spatial data models are closely related to map making, with each model having its own pros and cons. Switch the two shaders (speed vs quality) adaptively. Vector and raster data models are two basic models used to represent spatial data.
Use QMC sampling to handle highly nonlinear anisotropy. The same thing applies to the azimuthal projection: You can go from azimuthal coordinates -> equirectangular -> mercator and sample the image. zuho.js is a high-quality WebGL Equirectangular image viewer with many projection method. 5f) * PI // from -PI to PIįixed4 col = tex2D(_MainTex, float2(x,y)) This is what it would look like in a fragment shader from uvs: //uv to equirectangularįloat lat = (uv.x) * 2 * PI // from 0 to 2PIįloat lon = (uv.y. If you want to output the equirectangular projection, you need to convert from equirectangular coordinates to mercator coordinates and then sample the mercator projection at those coordinates.
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