小编Sam*_*lls的帖子

我想至少安装PIL和python-numpy.我想将图像转换为数组,但实际上似乎找不到有关安装/使用模块到raspberry pi的信息.有人可以解释一下吗？

I'm going to make this 2D rendering engine as modular as I possibly can. I've come up with, but haven't yet finished, a priority list for drawing/updating sprites, so that I can control which sprites are in front of each other.

This code is meant to loop through each priority list and render every sprite in that list.

//I don't entirely understand what this for-each type of loop does.

public static void renderSprites(ArrayList<ArrayList<AbstractSprite>> priorities){
    for (ArrayList<AbstractSprite> priority : priorities){
        for(AbstractSprite …

这也是来自 thebennybox 的 youtube 3D 游戏引擎系列（如果你今天找到了我之前的帖子），我在这个 addUniform 方法中很难找到问题。该位置总是结果为 0xFFFFFFFF 或 -1，抛出我定义的错误“找不到统一变量“uniformFloat”“

我的顶点着色器：

#version 330

layout (location = 0) in vec3 position;

out vec4 colour;

uniform float uniformFloat;

void main()
{
    colour = vec4(clamp(position, 0.0, uniformFloat), 1.0);
    gl_Position = vec4(position, 1.0);
}

我的着色器类：

package com.base.engine;

import static org.lwjgl.opengl.GL20.*;
import static org.lwjgl.opengl.GL32.*;

import java.util.HashMap;

public class Shader {
    private int program;
    private HashMap<String, Integer> uniforms;

    public Shader() {
        program = glCreateProgram();
        uniforms = new HashMap<String, Integer>();

        if (program == 0) {
            System.err.println("Shader …