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// Copyright (C) 2023 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
import QtQuick
import QtQuick3D
import QtQuick3D.Helpers
import QtQuick.Controls
import QtQuick.Layouts
import ProceduralTextureExample
ApplicationWindow {
id: window
width: 480
height: 320
visible: true
title: "Procedural Texture Example"
QtObject {
id: applicationState
property int size: size256.checked ? 256 : 16
property color startColor: "#00dbde"
property color endColor: "#fc00ff"
property int filterMode: size === 256 ? Texture.Linear : Texture.Nearest
property Texture texture: cppModeRadio.checked ? textureFromCpp : textureFromQML
function randomColor() : color {
return Qt.rgba(Math.random(),
Math.random(),
Math.random(),
1.0);
}
}
View3D {
anchors.fill: parent
DirectionalLight {
}
PerspectiveCamera {
z: 300
}
//! [cppTexture]
Texture {
id: textureFromCpp
minFilter: applicationState.filterMode
magFilter: applicationState.filterMode
textureData: gradientTexture
GradientTexture {
id: gradientTexture
startColor: applicationState.startColor
endColor: applicationState.endColor
width: applicationState.size
height: width
}
}
//! [cppTexture]
//! [qmlTexture]
Texture {
id: textureFromQML
minFilter: applicationState.filterMode
magFilter: applicationState.filterMode
textureData: gradientTextureDataQML
ProceduralTextureData {
id: gradientTextureDataQML
property color startColor: applicationState.startColor
property color endColor: applicationState.endColor
width: applicationState.size
height: width
textureData: generateTextureData()
function linearInterpolate(startColor : color, endColor : color, fraction : real) : color{
return Qt.rgba(
startColor.r + (endColor.r - startColor.r) * fraction,
startColor.g + (endColor.g - startColor.g) * fraction,
startColor.b + (endColor.b - startColor.b) * fraction,
startColor.a + (endColor.a - startColor.a) * fraction
);
}
function generateTextureData() {
let dataBuffer = new ArrayBuffer(width * height * 4)
let data = new Uint8Array(dataBuffer)
let gradientScanline = new Uint8Array(width * 4);
for (let x = 0; x < width; ++x) {
let color = linearInterpolate(startColor, endColor, x / width);
let offset = x * 4;
gradientScanline[offset + 0] = color.r * 255;
gradientScanline[offset + 1] = color.g * 255;
gradientScanline[offset + 2] = color.b * 255;
gradientScanline[offset + 3] = color.a * 255;
}
for (let y = 0; y < height; ++y) {
data.set(gradientScanline, y * width * 4);
}
return dataBuffer;
}
}
}
//! [qmlTexture]
Model {
source: "#Cube"
materials: [
PrincipledMaterial {
baseColorMap: applicationState.texture
}
]
PropertyAnimation on eulerRotation.y {
from: 0
to: 360
duration: 5000
loops: Animation.Infinite
running: true
}
}
}
Pane {
ColumnLayout {
GroupBox {
title: "Size:"
ButtonGroup {
id: sizeGroup
}
ColumnLayout {
RadioButton {
id: size256
text: "256x256"
checked: true
ButtonGroup.group: sizeGroup
}
RadioButton {
id: size512
text: "16x16"
checked: false
ButtonGroup.group: sizeGroup
}
}
}
GroupBox {
title: "Backend:"
ButtonGroup {
id: backendGroup
}
ColumnLayout {
RadioButton {
id: cppModeRadio
text: "C++"
checked: true
ButtonGroup.group: backendGroup
}
RadioButton {
id: qmlModeRadio
text: "QML"
checked: false
ButtonGroup.group: backendGroup
}
}
}
Button {
text: "Random Start Color"
onClicked: applicationState.startColor = applicationState.randomColor();
}
Button {
text: "Random End Color"
onClicked: applicationState.endColor = applicationState.randomColor();
}
}
}
}
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