56 lines
2 KiB
Java
56 lines
2 KiB
Java
package net.minecraft.client.renderer;
|
|
|
|
import com.mojang.blaze3d.buffers.GpuBuffer;
|
|
import com.mojang.blaze3d.buffers.GpuBufferSlice;
|
|
import com.mojang.blaze3d.buffers.Std140Builder;
|
|
import com.mojang.blaze3d.systems.GpuDevice;
|
|
import com.mojang.blaze3d.systems.RenderSystem;
|
|
import java.nio.ByteBuffer;
|
|
import net.fabricmc.api.EnvType;
|
|
import net.fabricmc.api.Environment;
|
|
import org.joml.Matrix4f;
|
|
import org.lwjgl.system.MemoryStack;
|
|
|
|
@Environment(EnvType.CLIENT)
|
|
public class CachedPerspectiveProjectionMatrixBuffer implements AutoCloseable {
|
|
private final GpuBuffer buffer;
|
|
private final GpuBufferSlice bufferSlice;
|
|
private final float zNear;
|
|
private final float zFar;
|
|
private int width;
|
|
private int height;
|
|
private float fov;
|
|
|
|
public CachedPerspectiveProjectionMatrixBuffer(String label, float zNear, float zFar) {
|
|
this.zNear = zNear;
|
|
this.zFar = zFar;
|
|
GpuDevice gpuDevice = RenderSystem.getDevice();
|
|
this.buffer = gpuDevice.createBuffer(() -> "Projection matrix UBO " + label, 136, RenderSystem.PROJECTION_MATRIX_UBO_SIZE);
|
|
this.bufferSlice = this.buffer.slice(0, RenderSystem.PROJECTION_MATRIX_UBO_SIZE);
|
|
}
|
|
|
|
public GpuBufferSlice getBuffer(int width, int height, float fov) {
|
|
if (this.width != width || this.height != height || this.fov != fov) {
|
|
Matrix4f matrix4f = this.createProjectionMatrix(width, height, fov);
|
|
|
|
try (MemoryStack memoryStack = MemoryStack.stackPush()) {
|
|
ByteBuffer byteBuffer = Std140Builder.onStack(memoryStack, RenderSystem.PROJECTION_MATRIX_UBO_SIZE).putMat4f(matrix4f).get();
|
|
RenderSystem.getDevice().createCommandEncoder().writeToBuffer(this.buffer.slice(), byteBuffer);
|
|
}
|
|
|
|
this.width = width;
|
|
this.height = height;
|
|
this.fov = fov;
|
|
}
|
|
|
|
return this.bufferSlice;
|
|
}
|
|
|
|
private Matrix4f createProjectionMatrix(int width, int height, float fov) {
|
|
return new Matrix4f().perspective(fov * (float) (Math.PI / 180.0), (float)width / height, this.zNear, this.zFar);
|
|
}
|
|
|
|
public void close() {
|
|
this.buffer.close();
|
|
}
|
|
}
|