ProjectionMatrixBuffer.java

net.minecraft.client.renderer.ProjectionMatrixBuffer

信息

• 全限定名：net.minecraft.client.renderer.ProjectionMatrixBuffer
• 类型：public class
• 包：net.minecraft.client.renderer
• 源码路径：src/main/java/net/minecraft/client/renderer/ProjectionMatrixBuffer.java
• 起始行号：L16
• 实现：AutoCloseable
• 职责：

  TODO

字段/常量

• buffer

  • 类型: GpuBuffer
  • 修饰符: package-private
  • 源码定位: L17
  • 说明:

    TODO

• bufferSlice

  • 类型: GpuBufferSlice
  • 修饰符: package-private
  • 源码定位: L18
  • 说明:

    TODO

• lastUploadedProjection

  • 类型: Projection
  • 修饰符: private
  • 源码定位: L19
  • 说明:

    TODO

• projectionMatrixVersion

  • 类型: long
  • 修饰符: private
  • 源码定位: L20
  • 说明:

    TODO

• tempMatrix

  • 类型: Matrix4f
  • 修饰符: private final
  • 源码定位: L21
  • 说明:

    TODO

内部类/嵌套类型

• 无

构造器

public ProjectionMatrixBuffer(String name) @ L23

• 构造器名：ProjectionMatrixBuffer
• 源码定位：L23
• 修饰符：public

参数:

• name: String

说明:

TODO

方法

下面的方法块按源码顺序生成。

public GpuBufferSlice getBuffer(Projection projection) @ L31

• 方法名：getBuffer
• 源码定位：L31
• 返回类型：GpuBufferSlice
• 修饰符：public

参数:

• projection: Projection

说明:

TODO

public GpuBufferSlice getBuffer(Matrix4f projectionMatrix) @ L43

• 方法名：getBuffer
• 源码定位：L43
• 返回类型：GpuBufferSlice
• 修饰符：public

参数:

• projectionMatrix: Matrix4f

说明:

TODO

private GpuBufferSlice writeBuffer(Matrix4f projectionMatrix) @ L49

• 方法名：writeBuffer
• 源码定位：L49
• 返回类型：GpuBufferSlice
• 修饰符：private

参数:

• projectionMatrix: Matrix4f

说明:

TODO

public void close() @ L58

• 方法名：close
• 源码定位：L58
• 返回类型：void
• 修饰符：public

参数:

• 无

说明:

TODO

代码

@OnlyIn(Dist.CLIENT)
public class ProjectionMatrixBuffer implements AutoCloseable {
    GpuBuffer buffer;
    GpuBufferSlice bufferSlice;
    private @Nullable Projection lastUploadedProjection;
    private long projectionMatrixVersion;
    private final Matrix4f tempMatrix = new Matrix4f();
 
    public ProjectionMatrixBuffer(String name) {
        this.lastUploadedProjection = null;
        this.projectionMatrixVersion = -1L;
        GpuDevice device = RenderSystem.getDevice();
        this.buffer = device.createBuffer(() -> "Camera projection matrix UBO " + name, 136, RenderSystem.PROJECTION_MATRIX_UBO_SIZE);
        this.bufferSlice = this.buffer.slice(0L, RenderSystem.PROJECTION_MATRIX_UBO_SIZE);
    }
 
    public GpuBufferSlice getBuffer(Projection projection) {
        assert projection.getMatrixVersion() != -1L;
 
        if (this.lastUploadedProjection == projection && projection.getMatrixVersion() == this.projectionMatrixVersion) {
            return this.bufferSlice;
        } else {
            this.lastUploadedProjection = projection;
            this.projectionMatrixVersion = projection.getMatrixVersion();
            return this.writeBuffer(projection.getMatrix(this.tempMatrix));
        }
    }
 
    public GpuBufferSlice getBuffer(Matrix4f projectionMatrix) {
        this.lastUploadedProjection = null;
        this.projectionMatrixVersion = -1L;
        return this.writeBuffer(projectionMatrix);
    }
 
    private GpuBufferSlice writeBuffer(Matrix4f projectionMatrix) {
        try (MemoryStack stack = MemoryStack.stackPush()) {
            ByteBuffer byteBuffer = Std140Builder.onStack(stack, RenderSystem.PROJECTION_MATRIX_UBO_SIZE).putMat4f(projectionMatrix).get();
            RenderSystem.getDevice().createCommandEncoder().writeToBuffer(this.buffer.slice(), byteBuffer);
        }
 
        return this.bufferSlice;
    }
 
    @Override
    public void close() {
        this.buffer.close();
    }
}

引用的其他类

• GpuBuffer

  • 引用位置: 字段

• GpuBufferSlice

  • 引用位置: 字段/返回值

• Std140Builder

  • 引用位置: 方法调用
  • 关联成员: Std140Builder.onStack()

• RenderSystem

  • 引用位置: 方法调用
  • 关联成员: RenderSystem.getDevice()

• Projection

  • 引用位置: 参数/字段