toowren Posted October 8, 2022 Share Posted October 8, 2022 Let's say there is an arbitrary composite (wall.png) shape in PixiJS. I need to project a texture onto it by some kind of a grid warp in a way, so the result would be similar to output.png. I have tried to do it via PIXI.SimplePlane and it seems that default projection algorithm at this framework is affine transformation. And the result have to be based on quad bi-linear projection. let pattern64 = "data:image/png;base64,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"; const app = new PIXI.Application({ width: 512, height: 324, antialias: true }); document.body.appendChild(app.view); app.loader.add('pattern', pattern64).load(inits); function inits() { const graphics = new PIXI.Graphics(); let path = [34, 100, 176, 100, 176, 224, 34, 224]; graphics.lineStyle(0); graphics.beginFill(0xBCBCBC, 1); graphics.drawPolygon(path); graphics.endFill(); path = [176, 100, 258, 60, 258, 264, 176, 224]; graphics.lineStyle(0); graphics.beginFill(0xCDCDCD, 1); graphics.drawPolygon(path); graphics.endFill(); path = [258, 60, 422, 104, 422, 220, 256, 264]; graphics.lineStyle(0); graphics.beginFill(0x606060, 1); graphics.drawPolygon(path); graphics.endFill(); path = [422, 104, 478, 104, 478, 220, 422, 220]; graphics.lineStyle(0); graphics.beginFill(0x909090, 1); graphics.drawPolygon(path); graphics.endFill(); app.stage.addChild(graphics); const texture = app.loader.resources.pattern.texture; const plane = new PIXI.SimplePlane(texture, 5, 3); app.stage.addChild(plane); let buffer = plane.geometry.getBuffer('aVertexPosition'); // graphics.beginFill(0xFF0000); // graphics.drawRect(buffer.data[20], buffer.data[21], 8, 8); // graphics.endFill(); //manually set just for this demo buffer.data[0] = 34; buffer.data[1] = 100; buffer.data[2] = 176; buffer.data[3] = 100; buffer.data[4] = 258; buffer.data[5] = 60; buffer.data[6] = 422; buffer.data[7] = 104; buffer.data[8] = 478; buffer.data[9] = 104; buffer.data[10] = 34; buffer.data[11] = 162; buffer.data[12] = 176; buffer.data[13] = 162; buffer.data[14] = 258; buffer.data[15] = 162; buffer.data[16] = 422; buffer.data[17] = 162; buffer.data[18] = 478; buffer.data[19] = 162; buffer.data[20] = 34; buffer.data[21] = 224; buffer.data[22] = 176; buffer.data[23] = 224; buffer.data[24] = 258; buffer.data[25] = 264; buffer.data[26] = 422; buffer.data[27] = 220; buffer.data[28] = 478; buffer.data[29] = 220; buffer.update(); } The code returns output2.png Yes, PixiJS has additional projections plugin (https://pixijs.io/examples/#/plugin-projection/quad-homo.js), but it seems that output could be controlled just by four corner points. In my case, I need more. At least 10 or even 15. If I couldn't use projection plugin, maybe there is a way to implement a custom shader for aVertexPositions and UVs?! Quote Link to comment Share on other sites More sharing options...
ivan.popelyshev Posted October 8, 2022 Share Posted October 8, 2022 (edited) > but it seems that output could be controlled just by four corner points. In my case, I need more. At least 10 or even 15. You are , honestly, first or second user who needs bilinear. I made that demo as a way to show "we can do it". I couldnt do the whole way with mesh because of time. I had to stop somewhere: I didnt know whether there are ppl who need it, and there were so many other features in other plugins that were needed. How to proceed? There are several ways, I suppose: 1. you do it yourself, using my bilinear shader. Yes, shader needs adjustments - need to move all those bilinear things into arguments instead of uniforms, either re-set uniforms and call shader for each quad separately. 2. post a discussion with a bounty on it in https://github.com/pixijs/pixijs/discussions , and i'll take it 3. try to persuade someone in pixijs discord to do it. Edited October 8, 2022 by ivan.popelyshev Quote Link to comment Share on other sites More sharing options...
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