Revision control
++ {
++ "QEN": {
++ "description": "Bends the source to circle / arc in the vertex shader.",
++ "name": "CircleBend",
++ "properties": [
++ {
++ "defaultValue": "0",
++ "description": "Start angle for the circle bending in radians.",
++ "maxValue": "6.283",
++ "minValue": "0",
++ "name": "circleBendStartAngle",
++ "type": "float"
++ },
++ {
++ "defaultValue": "6.283",
++ "description": "Spanning angle for the circle bending in radians.",
++ "maxValue": "6.283",
++ "minValue": "0",
++ "name": "circleBendSpanAngle",
++ "type": "float"
++ },
++ {
++ "defaultValue": "0.2",
++ "description": "Width of the bending ring. Values are between 0.0 and 1.0 (full size of the source item).",
++ "maxValue": "1",
++ "minValue": "0",
++ "name": "circleBendRingWidth",
++ "type": "float"
++ },
++ {
++ "customValue": "Qt.point(width, height)",
++ "defaultValue": "0, 0",
++ "maxValue": "1, 1",
++ "minValue": "0, 0",
++ "name": "circleBendTexSize",
++ "type": "vec2",
++ "useCustomValue": true
++ }
++ ],
++ "version": 1,
++ "vertexCode": [
++ "@mesh 512, 1",
++ "@main",
++ "{",
++ " const float PI_H = 1.5707964;",
++ " vec2 vPos = vec2(0.5);",
++ " float s = 0.5 - 0.5 * circleBendRingWidth + texCoord.y * 0.5 * circleBendRingWidth;",
++ " float spanX = texCoord.x * circleBendSpanAngle;",
++ " vPos.x += s * sin(circleBendStartAngle + spanX);",
++ " vPos.y += s * sin(circleBendStartAngle + spanX + PI_H);",
++ " vPos *= circleBendTexSize;",
++ " vertCoord = vPos;",
++ "}",
++ ""
++ ]
++ }
++ }