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我一直在使用方程式创建网格，但应用纹理似乎是一个问题。我创建了一个立方体和圆柱体，但是当应用纹理时，没有分配纹理，只有对象可见。我在这个链接的帮助下成功地创建了一个圆柱体 -如何在渲染脚本中制作一个圆柱体 ，我已经创建了一个自己的立方体。这 2 个对象是可见的，但不是应用于它们的纹理。我只能为我创建的 a3d 对象分配纹理，但不能为使用方程式创建的网格分配纹理。有什么想法我哪里出错了吗？请提出可能是什么问题，或者无法为此类网格应用纹理？

我使用的 CustomShader 是 shaderv.glsl 和 shaderf.glsl - 与示例中的相同

public Mesh cubeMesh(float ltf, float lbf, float rbf, float rtf, float ltb, float lbb, float rbb, float rtb){

    Mesh.TriangleMeshBuilder mbo= new TriangleMeshBuilder(mRSGL,3, Mesh.TriangleMeshBuilder.TEXTURE_0);
    //front
    mbo.setTexture(0, 0); 
    mbo.addVertex(-lbf, -lbf,lbf);  //lbf
    mbo.setTexture(1, 0);
    mbo.addVertex( rbf, -rbf,rbf);  //rbf
    mbo.setTexture(1, 1);
    mbo.addVertex( rtf, rtf, rtf);  //rtf
    mbo.setTexture(0, 1);
    mbo.addVertex(-ltf, ltf, ltf);  //ltf

    //top
    mbo.setTexture(0, 0);
    mbo.addVertex(-ltf, ltf,ltf);   //ltf
    mbo.setTexture(1, 0);
    mbo.addVertex(rtf, rtf,rtf);    //rtf
    mbo.setTexture(1, 1);
    mbo.addVertex(rtb, rtb,-rtb);   //rtb
    mbo.setTexture(0, 1);
    mbo.addVertex(-ltb, ltb,-ltb);  //ltb

    //back
        mbo.setTexture(0, 0);
    mbo.addVertex(rbb, -rbb,-rbb);  //rbb
    mbo.setTexture(1, 0);
    mbo.addVertex(-lbb, -lbb,-lbb); //lbb
    mbo.setTexture(1, 1);
    mbo.addVertex(-ltb, ltb,-ltb);  //ltb
    mbo.setTexture(0, 1);
    mbo.addVertex(rtb, rtb,-rtb);   //rtb

    //bottom
    mbo.setTexture(0, 0);
    mbo.addVertex(-lbb, -lbb,-lbb); //lbb
    mbo.setTexture(1, 0);
    mbo.addVertex(rbb, -rbb,-rbb);  //rbb
    mbo.setTexture(1, 1);
    mbo.addVertex(rbf, -rbf,rbf);   //rbf
    mbo.setTexture(0, 1);
    mbo.addVertex(-lbf, -lbf,lbf);  //lbf

    //left
    mbo.setTexture(0, 0);
    mbo.addVertex(-lbb, -lbb,-lbb); //lbb
    mbo.setTexture(1, 0);
    mbo.addVertex(-lbf, -lbf,lbf);  //lbf
    mbo.setTexture(1, 1);
    mbo.addVertex(-ltf, ltf,ltf);   //ltf
    mbo.setTexture(0, 1);
    mbo.addVertex(-ltb, ltb,-ltb);  //ltb

    //right
    mbo.setTexture(0, 0);
    mbo.addVertex(rbf, -rbf,rbf);   //rbf
    mbo.setTexture(1, 0);
    mbo.addVertex(rbb, -rbb,-rbb);  //rbb
    mbo.setTexture(1, 1);
    mbo.addVertex(rtb, rtb,-rtb);   //rtb
    mbo.setTexture(0, 1);
    mbo.addVertex(rtf, rtf,rtf);    //rtf

    mbo.addTriangle(0,1,2);//1
    mbo.addTriangle(2,3,0);

    mbo.addTriangle(4,5,6);//2
    mbo.addTriangle(6,7,4);

    mbo.addTriangle(8,9,10);//3
    mbo.addTriangle(10,11,8);

    mbo.addTriangle(12,13,14);//4
    mbo.addTriangle(14,15,12);

    mbo.addTriangle(16,17,18);//5
    mbo.addTriangle(18,19,16);

    mbo.addTriangle(20,21,22);//6
    mbo.addTriangle(22,23,20);

    return mbo.create(true);
}

private Mesh cylinder(){
    float radius=1.25f, halfLength=5;
    int slices=16;

    Mesh.TriangleMeshBuilder mbo= new TriangleMeshBuilder(mRSGL,3, Mesh.TriangleMeshBuilder.TEXTURE_0);

    /*vertex at middle of end*/
    mbo.addVertex(0.0f, halfLength, 0.0f);
    mbo.addVertex(0.0f, -halfLength, 0.0f);

    for(int i=0; i<slices; i++) {
         float theta = (float) (i*2.0*Math.PI / slices);
         float nextTheta = (float) ((i+1)*2.0*Math.PI / slices);

         /*vertices at edges of circle*/
         mbo.addVertex((float)(radius*Math.cos(theta)), halfLength, (float)(radius*Math.sin(theta)));
         mbo.addVertex((float)(radius*Math.cos(nextTheta)), halfLength, (float)(radius*Math.sin(nextTheta)));

         /* the same vertices at the bottom of the cylinder*/
         mbo.addVertex((float)(radius*Math.cos(nextTheta)), -halfLength, (float)(radius*Math.sin(nextTheta)));
         mbo.addVertex((float)(radius*Math.cos(theta)), -halfLength, (float)(radius*Math.sin(theta)));

         /*Add the faces for the ends, ordered for back face culling*/
         mbo.addTriangle(4*i+3, 4*i+2, 0); 
         //The offsets here are to adjust for the first two indices being the center points. The sector number (i) is multiplied by 4 because the way you are building this mesh, there are 4 vertices added with each sector
         mbo.addTriangle(4*i+5, 4*i+4, 1);
         /*Add the faces for the side*/
         mbo.addTriangle(4*i+2, 4*i+4, 4*i+5); 
         mbo.addTriangle(4*i+4, 4*i+2, 4*i+3);
    }

return mbo.create(true);
}

public void initMesh(){     

    m1= cubeMesh(1,1,1,1,1,1,1,1);
    mScript.set_gCubeMesh(m1);      //cube

    m2 = cylinder();
    mScript.set_gCylinder(m2);      //Cylinder
}

我最初像这样加载纹理：

 private void loadImages() {
    cubetex = loadTextureRGB(R.drawable.crate);
    cylindertex = loadTextureRGB(R.drawable.torusmap);
    mScript.set_cubetex(cubetex);
    mScript.set_gTexCylinder(cylindertex);
 }

在 rs 侧，由根调用的立方体和圆柱体函数：

static void displayCustomCube() 
{   

// Update vertex shader constants
// Load model matrix
// Apply a rotation to our mesh
gTorusRotation += 50.0f * gDt;
if (gTorusRotation > 360.0f) 
{
    gTorusRotation -= 360.0f;
}

// Setup the projection matrix
 if(once<1)
{
    float aspect = (float)rsgGetWidth() / (float)rsgGetHeight();
    rsMatrixLoadPerspective(&gVSConstants->proj, 40.0f, aspect, 0.1f, 1000.0f);
    once++;
}      


// Position our model on the screen    

rsMatrixLoadTranslate(&gVSConstants->model, 0,2,-10);   

setupCustomShaderLights();
rsgBindProgramVertex(gProgVertexCustom);

// Fragment shader with texture
rsgBindProgramStore(gProgStoreBlendNoneDepth);
rsgBindProgramFragment(gProgFragmentCustom);
rsgBindSampler(gProgFragmentCustom, 0, gLinearClamp);    
rsgBindTexture(gProgFragmentCustom, 0, cubetex);    

// Use no face culling
rsgBindProgramRaster(gCullNone);
rsgDrawMesh(gCubeMesh); // load cube model


}

static void displayCustomCylinder() 
{   

// Update vertex shader constants
// Load model matrix
// Apply a rotation to our mesh
gTorusRotation += 50.0f * gDt;
if (gTorusRotation > 360.0f) 
{
    gTorusRotation -= 360.0f;
}

// Setup the projection matrix

if(once<1)
{
    float aspect = (float)rsgGetWidth() / (float)rsgGetHeight();
    rsMatrixLoadPerspective(&gVSConstants->proj, 40.0f, aspect, 0.1f, 1000.0f);
    once++;
}    

// Position our model on the screen   

rsMatrixLoadTranslate(&gVSConstants->model, 0,2,-10);   

setupCustomShaderLights();
rsgBindProgramVertex(gProgVertexCustom);

// Fragment shader with texture
rsgBindProgramStore(gProgStoreBlendNoneDepth);
rsgBindProgramFragment(gProgFragmentCustom);
rsgBindSampler(gProgFragmentCustom, 0, gLinearClamp);
rsgBindTexture(gProgFragmentCustom, 0, gTexCylinder);

// Use no face culling
rsgBindProgramRaster(gCullNone);
rsgDrawMesh(gCylinder); // load cylinder model
}

setCustomShaderLights() 的定义是：

static void setupCustomShaderLights() 
{

float4 light0Pos = {xLight0Pos, yLight0Pos, zLight0Pos, aLight0Pos};    
float4 light1Pos = { 0.0f, 0.0f,  20.0f, 1.0f};

float4 light0DiffCol = {xDiffColLight0, yDiffColLight0, zDiffColLight0, aDiffColLight0};   
float4 light0SpecCol = {xSpecColLight0, ySpecColLight0, zSpecColLight0, aSpecColLight0};

float4 light1DiffCol = {0.5f, 0.5f, 0.9f, 1.0f};
float4 light1SpecCol = {0.5f, 0.5f, 0.9f, 1.0f};

gLight0Rotation += 50.0f * gDt;
if (gLight0Rotation > 360.0f) 
{
    gLight0Rotation -= 360.0f;
}
gLight1Rotation -= 50.0f * gDt;
if (gLight1Rotation > 360.0f) 
{
    gLight1Rotation -= 360.0f;
}

// Set light 0 properties
gVSConstants->light0_Posision = light0Pos;    
gVSConstants->light0_Diffuse = DiffLight0Val;
gVSConstants->light0_Specular = SpecLight0Val;
gVSConstants->light0_CosinePower = Light0Cos;

// Set light 1 properties
gVSConstants->light1_Posision = light1Pos;
gVSConstants->light1_Diffuse = 1.0f;
gVSConstants->light1_Specular = 0.7f;
gVSConstants->light1_CosinePower = 25.0f;

rsgAllocationSyncAll(rsGetAllocation(gVSConstants));

// Update fragmetn shader constants
// Set light 0 colors
gFSConstants->light0_DiffuseColor = light0DiffCol;
gFSConstants->light0_SpecularColor = light0SpecCol;
// Set light 1 colors
gFSConstants->light1_DiffuseColor = light1DiffCol;
gFSConstants->light1_SpecularColor = light1SpecCol;
rsgAllocationSyncAll(rsGetAllocation(gFSConstants));

}

和 loadTextureRGB() 是：

private Allocation loadTextureRGB(int id) 
{
    return Allocation.createFromBitmapResource(mRSGL, mRes, id,
                                               Allocation.MipmapControl.MIPMAP_ON_SYNC_TO_TEXTURE,
                                               Allocation.USAGE_GRAPHICS_TEXTURE);
}
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1 回答 1

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对这些网格进行纹理化绝对是可能的。它可能不是解决您的问题的唯一方法，但是您没有获得任何圆柱体纹理的原因之一是您在创建该网格时从未声明该网格的纹理坐标。不过，您支持多维数据集，因此只需将该方法转移过来。至于为什么没有显示纹理，我没有立即看到您的代码有任何问题。您的自定义着色器的 GLSL 代码是什么？它与 MiscSamples 示例中的相同吗？你对 setupCustomShaderLights() 和 loadTextureRGB() 的定义如何？示例代码中的它们是否也相同？

于 2012-05-28T18:26:05.510 回答