feat(render): 实现模型旋转中心点支持- 为 ModelPart 添加 pivot 属性，支持设置旋转中心点
- 更新局部变换矩阵计算，考虑 pivot 对旋转和平移的影响 - 在 Mesh2D 中增强着色器 uniform 设置，兼容 uModelMatrix 和 uModel- 添加 setPivot 和 getPivot 方法，支持动态调整旋转中心- 创建测试用例 ModelRenderTest2，验证不同 pivot 点的旋转效果 -修复纹理绑定逻辑，确保渲染时正确应用纹理 - 添加调试纹理生成功能，便于视觉验证 pivot 效果
This commit is contained in:
tzdwindows 7
230
src/main/java/com/chuangzhou/vivid2D/test/ModelRenderTest2.java
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230
src/main/java/com/chuangzhou/vivid2D/test/ModelRenderTest2.java
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package com.chuangzhou.vivid2D.test;
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import com.chuangzhou.vivid2D.render.ModelRender;
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import com.chuangzhou.vivid2D.render.model.Model2D;
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import com.chuangzhou.vivid2D.render.model.ModelPart;
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import com.chuangzhou.vivid2D.render.model.util.Mesh2D;
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import com.chuangzhou.vivid2D.render.model.util.Texture;
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import org.joml.Matrix3f;
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import org.joml.Vector2f;
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import org.lwjgl.glfw.GLFW;
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import org.lwjgl.glfw.GLFWErrorCallback;
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import org.lwjgl.glfw.GLFWVidMode;
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import org.lwjgl.opengl.GL;
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import org.lwjgl.system.MemoryUtil;
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import java.nio.ByteBuffer;
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/**
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* 用于测试中心点旋转
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* @author tzdwindows 7
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*/
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public class ModelRenderTest2 {
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private static final int WINDOW_WIDTH = 800;
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private static final int WINDOW_HEIGHT = 600;
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private static final String WINDOW_TITLE = "Simple Pivot Test";
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private long window;
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private boolean running = true;
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private Model2D testModel;
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private float rotationAngle = 0f;
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private int testCase = 0;
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private Mesh2D squareMesh;
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public static void main(String[] args) {
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new ModelRenderTest2().run();
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}
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public void run() {
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try {
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init();
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loop();
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} catch (Throwable t) {
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t.printStackTrace();
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} finally {
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cleanup();
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}
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}
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private void init() {
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GLFWErrorCallback.createPrint(System.err).set();
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if (!GLFW.glfwInit()) {
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throw new IllegalStateException("Unable to initialize GLFW");
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}
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GLFW.glfwDefaultWindowHints();
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GLFW.glfwWindowHint(GLFW.GLFW_VISIBLE, GLFW.GLFW_FALSE);
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GLFW.glfwWindowHint(GLFW.GLFW_RESIZABLE, GLFW.GLFW_TRUE);
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GLFW.glfwWindowHint(GLFW.GLFW_CONTEXT_VERSION_MAJOR, 3);
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GLFW.glfwWindowHint(GLFW.GLFW_CONTEXT_VERSION_MINOR, 3);
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GLFW.glfwWindowHint(GLFW.GLFW_OPENGL_PROFILE, GLFW.GLFW_OPENGL_CORE_PROFILE);
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GLFW.glfwWindowHint(GLFW.GLFW_OPENGL_FORWARD_COMPAT, GLFW.GLFW_TRUE);
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window = GLFW.glfwCreateWindow(WINDOW_WIDTH, WINDOW_HEIGHT, WINDOW_TITLE, MemoryUtil.NULL, MemoryUtil.NULL);
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if (window == MemoryUtil.NULL) throw new RuntimeException("Failed to create GLFW window");
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GLFWVidMode vidMode = GLFW.glfwGetVideoMode(GLFW.glfwGetPrimaryMonitor());
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GLFW.glfwSetWindowPos(window,
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(vidMode.width() - WINDOW_WIDTH) / 2,
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(vidMode.height() - WINDOW_HEIGHT) / 2);
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GLFW.glfwSetKeyCallback(window, (wnd, key, scancode, action, mods) -> {
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if (key == GLFW.GLFW_KEY_ESCAPE && action == GLFW.GLFW_RELEASE) running = false;
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if (key == GLFW.GLFW_KEY_SPACE && action == GLFW.GLFW_RELEASE) {
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testCase = (testCase + 1) % 3;
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updatePivotPoint();
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}
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if (key == GLFW.GLFW_KEY_R && action == GLFW.GLFW_RELEASE) {
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resetPosition();
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}
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});
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GLFW.glfwSetWindowSizeCallback(window, (wnd, w, h) -> ModelRender.setViewport(w, h));
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GLFW.glfwMakeContextCurrent(window);
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GLFW.glfwSwapInterval(1);
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GLFW.glfwShowWindow(window);
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GL.createCapabilities();
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createSimpleTestModel();
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ModelRender.initialize();
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System.out.println("Simple pivot test initialized");
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System.out.println("Controls: ESC = exit | SPACE = change pivot | R = reset position");
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}
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/**
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* Create a single square mesh with vertices centered at origin
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*/
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private void createSimpleTestModel() {
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testModel = new Model2D("SimpleTest");
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ModelPart square = testModel.createPart("square");
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square.setPosition(0, 0); // center of window
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square.setPivot(0,0);
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// Create 80x80 quad centered at origin
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squareMesh = Mesh2D.createQuad("square_mesh", 80, 80);
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// Shift vertices so center is at (0,0)
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//for (int i = 0; i < squareMesh.getVertexCount(); i++) {
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// Vector2f v = squareMesh.getVertex(i);
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// v.sub(0, 0);
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// squareMesh.setVertex(i, v.x, v.y);
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//}
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squareMesh.setTexture(createDiagnosticTexture());
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square.addMesh(squareMesh); // do NOT bake to world coordinates
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System.out.println("Simple test model created with one part only");
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}
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/**
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* Create a diagnostic texture to see pivot visually
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*/
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private Texture createDiagnosticTexture() {
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int width = 80, height = 80;
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ByteBuffer buf = MemoryUtil.memAlloc(width * height * 4);
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for (int y = 0; y < height; y++) {
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for (int x = 0; x < width; x++) {
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// center cross
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if (x == width / 2 || y == height / 2) {
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buf.put((byte) 255).put((byte) 255).put((byte) 255).put((byte) 255);
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} else if (x < width / 2 && y < height / 2) {
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buf.put((byte) 255).put((byte) 0).put((byte) 0).put((byte) 255); // top-left red
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} else if (x >= width / 2 && y < height / 2) {
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buf.put((byte) 0).put((byte) 255).put((byte) 0).put((byte) 255); // top-right green
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} else if (x < width / 2 && y >= height / 2) {
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buf.put((byte) 0).put((byte) 0).put((byte) 255).put((byte) 255); // bottom-left blue
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} else {
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buf.put((byte) 255).put((byte) 255).put((byte) 0).put((byte) 255); // bottom-right yellow
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}
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}
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}
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buf.flip();
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Texture texture = new Texture("diagnostic", width, height, Texture.TextureFormat.RGBA, buf);
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MemoryUtil.memFree(buf);
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return texture;
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}
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private void updatePivotPoint() {
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ModelPart square = testModel.getPart("square");
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if (square != null) {
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switch (testCase) {
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case 0:
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square.setPivot(0, 0);
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System.out.println("Pivot: center (0,0) - should rotate around center");
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break;
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case 1:
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square.setPivot(-40, 40); // top-left corner
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System.out.println("Pivot: top-left (-40,40) - should rotate around top-left");
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break;
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case 2:
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square.setPivot(40, -40); // bottom-right corner
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System.out.println("Pivot: bottom-right (40,-40) - should rotate around bottom-right");
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break;
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}
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}
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}
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private void resetPosition() {
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ModelPart square = testModel.getPart("square");
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if (square != null) {
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square.setPosition(400, 300);
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square.setRotation(0);
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rotationAngle = 0;
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System.out.println("Position reset");
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}
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}
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private void loop() {
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long last = System.nanoTime();
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double nsPerUpdate = 1_000_000_000.0 / 60.0;
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double accumulator = 0.0;
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while (running && !GLFW.glfwWindowShouldClose(window)) {
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long now = System.nanoTime();
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accumulator += (now - last) / nsPerUpdate;
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last = now;
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while (accumulator >= 1.0) {
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update(1.0f / 60.0f);
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accumulator -= 1.0;
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}
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render();
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GLFW.glfwSwapBuffers(window);
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GLFW.glfwPollEvents();
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}
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}
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private void update(float dt) {
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rotationAngle += dt * 1.5f;
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ModelPart square = testModel.getPart("square");
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if (square != null) {
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square.setRotation(rotationAngle);
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}
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testModel.update(dt);
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}
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private void render() {
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ModelRender.setClearColor(0.2f, 0.2f, 0.3f, 1.0f);
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ModelRender.render(1.0f / 60.0f, testModel);
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}
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private void cleanup() {
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System.out.println("Cleaning up resources...");
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ModelRender.cleanup();
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Texture.cleanupAll();
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if (window != MemoryUtil.NULL) GLFW.glfwDestroyWindow(window);
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GLFW.glfwTerminate();
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GLFW.glfwSetErrorCallback(null).free();
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System.out.println("Test finished");
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}
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}
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