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社区首页 >问答首页 >通过设置绘制立方体表面的点的位置来设置旋转

问通过设置绘制立方体表面的点的位置来设置旋转
EN

Stack Overflow用户
提问于 2016-08-12 21:49:51
回答 1查看 242关注 0票数 1

我在“我的世界”里用的是.但这不重要。

重要的是，我正在用顶点绘制一个立方体。每个脸都有4个位置点。

首先看一下世界坐标。我按以下顺序向顶点/面添加位置: DCBA.你以后会收到的..(希望如此)

​

​

基于此，我是这样绘制立方体的：

代码语言：javascript
运行
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public void renderParticles(World w, float x, float y, float z, Tesselator t)
{//**THIS IS AN EXAMPLE METHOD**
int scale = 1;
Random r;

int rotX = r.NextInt(10);
int rotY = r.NextInt(10);
int rotZ = r.NextInt(10);

//front face
     t.addVertex(x,        y,        z);
     t.addVertex(x,        y + scale,z);
     t.addVertex(x + scale,y + scale,z);
     t.addVertex(x + scale,y,        z);

//left face (I might have the Z coords wrong but that doesnt matter right now - basically the other direction)
     t.addVertex(x,          y,        z + scale);
     t.addVertex(x,          y + scale,z + scale);
     t.addVertex(x,          y + scale,z);
     t.addVertex(x,          y,        z);

//back face
     t.addVertex(x + scale,y,        z + scale);
     t.addVertex(x + scale,y + scale,z + scale);
     t.addVertex(x,        y + scale,z + scale);
     t.addVertex(x,        y,        z + scale);

//right face
     t.addVertex(x + scale,y,        z);
     t.addVertex(x + scale,y + scale,z);
     t.addVertex(x + scale,y + scale,z + scale);
     t.addVertex(x + scale,y,        z + scale);

//top face
     t.addVertex(x,        y + scale,z);
     t.addVertex(x,        y + scale,z + scale);
     t.addVertex(x + scale,y + scale,z + scale);
     t.addVertex(x + scale,y + scale,z);

//bottom face
     t.addVertex(x,        y,        z + scale);
     t.addVertex(x,        y,        z);
     t.addVertex(x + scale,y,        z);
     t.addVertex(x + scale,y,        z + scale);
}

当这个立方体产生/绘制时，我希望它已经被随机旋转。

我不知道这么硬的数学..。

，为什么我不把这个贴在地雷锻造论坛上？

这个代码所包含的-The模块是一个coremod(它们在那里不支持它们)

-Actually已经让他们失望了，他们告诉我，首先要把它变成正常的模式。

。

我有什么想法可以旋转这个立方体(我希望我正确地写出了所有的立方体面:D)？

编辑：

下面是我现在使用的代码，因为我将其更新为mc版本1.10：

代码语言：javascript
运行
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/**
 * Renders the particle
 */
public void renderParticle(VertexBuffer worldRendererIn, Entity entityIn, float partialTicks, float rotationX,
        float rotationZ, float rotationYZ, float rotationXY, float rotationXZ) {
    float f = ((float) this.particleTextureIndexX + this.particleTextureJitterX / 4.0F) / 16.0F;
    float f1 = f + 0.015609375F;
    float f2 = ((float) this.particleTextureIndexY + this.particleTextureJitterY / 4.0F) / 16.0F;
    float f3 = f2 + 0.015609375F;
    float f4 = 0.1F * this.particleScale;

    if (this.particleTexture != null) {
        f = this.particleTexture.getInterpolatedU((double) (this.particleTextureJitterX / 4.0F * 16.0F));
        f1 = this.particleTexture.getInterpolatedU((double) ((this.particleTextureJitterX + 1.0F) / 4.0F * 16.0F));
        f2 = this.particleTexture.getInterpolatedV((double) (this.particleTextureJitterY / 4.0F * 16.0F));
        f3 = this.particleTexture.getInterpolatedV((double) ((this.particleTextureJitterY + 1.0F) / 4.0F * 16.0F));
    }

    float f5 = (float) (this.prevPosX + (this.posX - this.prevPosX) * (double) partialTicks - interpPosX);
    float f6 = (float) (this.prevPosY + (this.posY - this.prevPosY) * (double) partialTicks - interpPosY);
    float f7 = (float) (this.prevPosZ + (this.posZ - this.prevPosZ) * (double) partialTicks - interpPosZ);

    int i = this.getBrightnessForRender(partialTicks);
    int j = i >> 16 & 65535;
    int k = i & 65535;

    if (Minecraft.isFancyGraphicsEnabled() == true) {
        if (spawned == false) {
            this.particleRed *= 1.35F;
            this.particleGreen *= 1.35F;
            this.particleBlue *= 1.35F;

            spawned = true;
        }

        // front
        worldRendererIn.pos(f5 + f4, f6, f7 + f4).tex((double) f, (double) f2)
                .color(this.particleRed, this.particleGreen, this.particleBlue, this.particleAlpha).lightmap(j, k)
                .endVertex();
        worldRendererIn.pos(f5 + f4, f6 + f4, f7 + f4).tex((double) f, (double) f3)
                .color(this.particleRed, this.particleGreen, this.particleBlue, this.particleAlpha).lightmap(j, k)
                .endVertex();
        worldRendererIn.pos(f5, f6 + f4, f7 + f4).tex((double) f1, (double) f3)
                .color(this.particleRed, this.particleGreen, this.particleBlue, this.particleAlpha).lightmap(j, k)
                .endVertex();
        worldRendererIn.pos(f5, f6, f7 + f4).tex((double) f1, (double) f2)
                .color(this.particleRed, this.particleGreen, this.particleBlue, this.particleAlpha).lightmap(j, k)
                .endVertex();

        // back
        worldRendererIn.pos(f5, f6, f7).tex((double) f1, (double) f3)
                .color(this.particleRed, this.particleGreen, this.particleBlue, this.particleAlpha).lightmap(j, k)
                .endVertex();

        worldRendererIn.pos(f5, f6 + f4, f7).tex((double) f1, (double) f2)
                .color(this.particleRed, this.particleGreen, this.particleBlue, this.particleAlpha).lightmap(j, k)
                .endVertex();
        // done
        worldRendererIn.pos(f5 + f4, f6 + f4, f7).tex((double) f, (double) f2)
                .color(this.particleRed, this.particleGreen, this.particleBlue, this.particleAlpha).lightmap(j, k)
                .endVertex();

        worldRendererIn.pos(f5 + f4, f6, f7).tex((double) f, (double) f3)
                .color(this.particleRed, this.particleGreen, this.particleBlue, this.particleAlpha).lightmap(j, k)
                .endVertex();

        // left
        worldRendererIn.pos(f5, f6, f7 + f4).tex((double) f1, (double) f2)
                .color(this.particleRed, this.particleGreen, this.particleBlue, this.particleAlpha).lightmap(j, k)
                .endVertex();
        worldRendererIn.pos(f5, f6 + f4, f7 + f4).tex((double) f, (double) f2)
                .color(this.particleRed, this.particleGreen, this.particleBlue, this.particleAlpha).lightmap(j, k)
                .endVertex();
        worldRendererIn.pos(f5, f6 + f4, f7).tex((double) f, (double) f3)
                .color(this.particleRed, this.particleGreen, this.particleBlue, this.particleAlpha).lightmap(j, k)
                .endVertex();
        worldRendererIn.pos(f5, f6, f7).tex((double) f1, (double) f3)
                .color(this.particleRed, this.particleGreen, this.particleBlue, this.particleAlpha).lightmap(j, k)
                .endVertex();

        // right
        worldRendererIn.pos(f5 + f4, f6, f7).tex((double) f, (double) f3)
                .color(this.particleRed, this.particleGreen, this.particleBlue, this.particleAlpha).lightmap(j, k)
                .endVertex();
        worldRendererIn.pos(f5 + f4, f6 + f4, f7).tex((double) f1, (double) f3)
                .color(this.particleRed, this.particleGreen, this.particleBlue, this.particleAlpha).lightmap(j, k)
                .endVertex();
        worldRendererIn.pos(f5 + f4, f6 + f4, f7 + f4).tex((double) f1, (double) f2)
                .color(this.particleRed, this.particleGreen, this.particleBlue, this.particleAlpha).lightmap(j, k)
                .endVertex();
        worldRendererIn.pos(f5 + f4, f6, f7 + f4).tex((double) f, (double) f2)
                .color(this.particleRed, this.particleGreen, this.particleBlue, this.particleAlpha).lightmap(j, k)
                .endVertex();

        // top
        worldRendererIn.pos(f5, f6 + f4, f7).tex((double) f1, (double) f3)
                .color(this.particleRed, this.particleGreen, this.particleBlue, this.particleAlpha).lightmap(j, k)
                .endVertex();
        worldRendererIn.pos(f5, f6 + f4, f7 + f4).tex((double) f1, (double) f2)
                .color(this.particleRed, this.particleGreen, this.particleBlue, this.particleAlpha).lightmap(j, k)
                .endVertex();
        worldRendererIn.pos(f5 + f4, f6 + f4, f7 + f4).tex((double) f, (double) f2)
                .color(this.particleRed, this.particleGreen, this.particleBlue, this.particleAlpha).lightmap(j, k)
                .endVertex();
        worldRendererIn.pos(f5 + f4, f6 + f4, f7).tex((double) f, (double) f3)
                .color(this.particleRed, this.particleGreen, this.particleBlue, this.particleAlpha).lightmap(j, k)
                .endVertex();

        // bottom
        worldRendererIn.pos(f5, f6, f7 + f4).tex((double) f, (double) f2)
                .color(this.particleRed, this.particleGreen, this.particleBlue, this.particleAlpha).lightmap(j, k)
                .endVertex();
        worldRendererIn.pos(f5, f6, f7).tex((double) f, (double) f3)
                .color(this.particleRed, this.particleGreen, this.particleBlue, this.particleAlpha).lightmap(j, k)
                .endVertex();
        worldRendererIn.pos(f5 + f4, f6, f7).tex((double) f1, (double) f3)
                .color(this.particleRed, this.particleGreen, this.particleBlue, this.particleAlpha).lightmap(j, k)
                .endVertex();
        worldRendererIn.pos(f5 + f4, f6, f7 + f4).tex((double) f1, (double) f2)
                .color(this.particleRed, this.particleGreen, this.particleBlue, this.particleAlpha).lightmap(j, k)
                .endVertex();
    } else {
        worldRendererIn
                .pos((f5 - rotationX * f4 - rotationXY * f4), (double) (f6 - rotationZ * f4),
                        (double) (f7 - rotationYZ * f4 - rotationXZ * f4))
                .tex((double) f, (double) f3).color(this.particleRed, this.particleGreen, this.particleBlue, 1.0F)
                .lightmap(j, k).endVertex();
        worldRendererIn
                .pos((double) (f5 - rotationX * f4 + rotationXY * f4), (double) (f6 + rotationZ * f4),
                        (double) (f7 - rotationYZ * f4 + rotationXZ * f4))
                .tex((double) f, (double) f2).color(this.particleRed, this.particleGreen, this.particleBlue, 1.0F)
                .lightmap(j, k).endVertex();
        worldRendererIn
                .pos((double) (f5 + rotationX * f4 + rotationXY * f4), (double) (f6 + rotationZ * f4),
                        (double) (f7 + rotationYZ * f4 + rotationXZ * f4))
                .tex((double) f1, (double) f2).color(this.particleRed, this.particleGreen, this.particleBlue, 1.0F)
                .lightmap(j, k).endVertex();
        worldRendererIn
                .pos((double) (f5 + rotationX * f4 - rotationXY * f4), (double) (f6 - rotationZ * f4),
                        (double) (f7 + rotationYZ * f4 - rotationXZ * f4))
                .tex((double) f1, (double) f3).color(this.particleRed, this.particleGreen, this.particleBlue, 1.0F)
                .lightmap(j, k).endVertex();
    }
}
java
opengl
rotation
minecraft
cube
EN

回答 1

Stack Overflow用户

发布于 2016-09-05 13:24:12

代码语言：javascript
运行
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GL11.glPushMatrix();
float rotateAxis = 1.0f;
float stableAxis = 0.0f;

int degreesPitch = (1+random.nextInt(4))*90;
int degreesRoll = (1+random.nextInt(4))*90;
int degreesYaw = (1+random.nextInt(4))*90;

GL11.glRotate(degreesRoll , stableAxis ,stableAxis ,rotateAxis );
GL11.glRotate(degreesYaw , stableAxis ,rotateAxis ,stableAxis );
GL11.glRotate(degreesPitch ,rotateAxis ,stableAxis ,stableAxis );
//Your tessellator code
tessellator.draw();
GL11.glPopMatrix();

不要做tessellator.addVertex，而是做tessellator.addVertexWithUV(vertexX, vertexY, vertexY, U,V)，这样就有了纹理顶点。

别忘了最后给tessellator.draw()打电话。

了解偏航、俯仰和滚动http://howthingsfly.si.edu/flight-dynamics/roll-pitch-and-yaw是有用的

编辑

好吧，你的代码是这样的，这是一个完整的四边形。

代码语言：javascript
运行
复制
    // front
    worldRendererIn.pos(f5 + f4, f6, f7 + f4).tex((double) f, (double) f2)
            .color(this.particleRed, this.particleGreen, this.particleBlue, this.particleAlpha).lightmap(j, k)
            .endVertex();
    worldRendererIn.pos(f5 + f4, f6 + f4, f7 + f4).tex((double) f, (double) f3)
            .color(this.particleRed, this.particleGreen, this.particleBlue, this.particleAlpha).lightmap(j, k)
            .endVertex();
    worldRendererIn.pos(f5, f6 + f4, f7 + f4).tex((double) f1, (double) f3)
            .color(this.particleRed, this.particleGreen, this.particleBlue, this.particleAlpha).lightmap(j, k)
            .endVertex();
    worldRendererIn.pos(f5, f6, f7 + f4).tex((double) f1, (double) f2)
            .color(this.particleRed, this.particleGreen, this.particleBlue, this.particleAlpha).lightmap(j, k)
            .endVertex();

要绘制四角图，您需要设置您的世界呈现器模式。

代码语言：javascript
运行
复制
   //OpenGL enable/blend functions/etc... here
   // for example GL11.glScalef(scale, scale, scale);

   worldrenderer.begin(7, DefaultVertexFormats.POSITION_TEX_COLOR_NORMAL);

   // your vertex defining code
   // your vertex defining code
   // your vertex defining code

    worldRendererIn.normal(0.0f, 0.0f, 1.0f);


   tessellator.draw();
   // OPENGL disable code here

最后一行tesselator.draw()将确保它被绘制到屏幕上，顶点缓冲区被刷新到一个显示列表中。

票数 1
EN
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：

https://stackoverflow.com/questions/38926935

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