从this帖子中了解到，我使用glDrawElements函数绘制了一个多维数据集，而不是使用glDrawArrays(GL_TRIANGLES, 0, 6)函数绘制一个由大量顶点列表中指定的三角形组成的多维数据集
我使用glDrawArrays函数成功构建了两个三角形以创建纹理方块，但是当我在新的glDrawElements方法上尝试相同的方法时，我似乎无法使其工作。 ..
这就是我此刻绘制立方体的方式（包括我对纹理的尝试）：
void SkyBox::constructGeometry(Shader* myShader)
{
verts[0] = -dimX; verts[ 1] = -dimY; verts[ 2] = -dimZ; //0
verts[3] = -dimX; verts[ 4] = dimY; verts[ 5] = -dimZ; //1
verts[6] = dimX; verts[ 7] = dimY; verts[ 8] = -dimZ; //2
verts[9] = dimX; verts[10] = -dimY; verts[11] = -dimZ; //3
verts[12] = -dimX; verts[13] = -dimY; verts[14] = dimZ; //4
verts[15] = -dimX; verts[16] = dimY; verts[17] = dimZ; //5
verts[18] = dimX; verts[19] = dimY; verts[20] = dimZ; //6
verts[21] = dimX; verts[22] = -dimY; verts[23] = dimZ; //7
cols[0] = 0.0; cols[ 1] = 0.0; cols[ 2] = 0.0;
cols[3] = 0.0; cols[ 4] = 1.0; cols[ 5] = 0.0;
cols[6] = 0.0; cols[ 7] = 0.0; cols[ 8] = 1.0;
cols[9] = 1.0; cols[10] = 1.0; cols[11] = 1.0;
cols[12] = 1.0; cols[13] = 0.0; cols[14] = 0.0;
cols[15] = 0.0; cols[16] = 1.0; cols[17] = 0.0;
cols[18] = 0.0; cols[19] = 0.0; cols[20] = 1.0;
cols[21] = 1.0; cols[22] = 1.0; cols[23] = 0.0;
tris[0] =0; tris[1] =1; tris[2] =2;
tris[3] =0; tris[4] =2; tris[5] =3;
tris[6] =4; tris[7] =6; tris[8] =5;
tris[9] =4; tris[10]=7; tris[11]=6;
tris[12]=1; tris[13]=5; tris[14]=6;
tris[15]=1; tris[16]=6; tris[17]=2;
tris[18]=0; tris[19]=7; tris[20]=4;
tris[21]=0; tris[22]=3; tris[23]=7;
tris[24]=0; tris[25]=5; tris[26]=1;
tris[27]=0; tris[28]=4; tris[29]=5;
tris[30]=3; tris[31]=2; tris[32]=7;
tris[33]=2; tris[34]=6; tris[35]=7;
tex[0] = 0.0; tex[1] = 0.0; tex[2] = 0.0;
tex[3] = 0.0; tex[4] = 0.0; tex[5] = 0.0;
tex[6] = 1.0; tex[7] = 1.0; tex[8] = 1.0;
tex[9] = 1.0; tex[10] = 1.0; tex[11] = 1.0;
tex[12] = 0.0; tex[13] = 1.0; tex[14] = 1.0;
tex[15] = 0.0; tex[16] = 1.0; tex[17] = 0.0;
tex[18] = 0.0; tex[19] = 1.0; tex[20] = 1.0;
tex[21] = 0.0; tex[22] = 0.0; tex[23] = 1.0;
tex[24] = 0.0; tex[25] = 1.0; tex[26] = 0.0;
tex[27] = 0.0; tex[28] = 1.0; tex[29] = 1.0;
tex[30] = 0.0; tex[31] = 0.0; tex[32] = 1.0;
tex[33] = 0.0; tex[34] = 1.0; tex[35] = 1.0;
glGenVertexArrays(2, &m_vaoID[0]);
glBindVertexArray(m_vaoID[0]);
glGenBuffers(3, m_vboID);
GLint vertexLocation= glGetAttribLocation(myShader->handle(), "in_Position");
GLint colorLocation= glGetAttribLocation(myShader->handle(), "in_Color");
GLint texCoordLocation = glGetAttribLocation(myShader->handle(), "in_TexCoord");
glUniform1i(glGetUniformLocation(myShader->handle(), "DiffuseMap"), 0);
glBindBuffer(GL_ARRAY_BUFFER, m_vboID[0]);
glBufferData(GL_ARRAY_BUFFER, numOfVerts2 *3*sizeof(GLfloat), verts, GL_STATIC_DRAW);
glVertexAttribPointer(vertexLocation, 3, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(vertexLocation);
glBindBuffer(GL_ARRAY_BUFFER, m_vboID[1]);
glBufferData(GL_ARRAY_BUFFER, numOfVerts2 *3*sizeof(GLfloat), cols, GL_STATIC_DRAW);
glVertexAttribPointer(colorLocation, 3, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(colorLocation);
glBindBuffer(GL_ARRAY_BUFFER, m_vboID[2]);
glBufferData(GL_ARRAY_BUFFER, numOfTexs *sizeof(GLfloat), tex, GL_STATIC_DRAW);
glVertexAttribPointer(texCoordLocation, 2, GL_FLOAT, GL_FALSE, 0,0);
glEnableVertexAttribArray(texCoordLocation);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glGenBuffers(1, &ibo);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, ibo);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, numOfTris2 * 3 * sizeof(unsigned int), tris, GL_STATIC_DRAW);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
glEnableVertexAttribArray(0);
glBindVertexArray(0);
}
我是如何呈现它的：
void SkyBox::render(Shader* myShader) //shader expected
{
glUseProgram(myShader->handle()); //shader
glBindTexture(GL_TEXTURE_2D, texName); //blending needed to use alpha channel
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
//draw objects
glBindVertexArray(m_vaoID[0]); // select VAO
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, ibo); //element arrays to draw indices from an array
glDrawElements(GL_TRIANGLES, numOfTris2 *3, GL_UNSIGNED_INT, 0);
glDisable(GL_BLEND);
glUseProgram(0);
glBindVertexArray(0);
}
我整个晚上一直在盯着它，所以我可能会错过一些非常愚蠢的东西，但我只是看不出我出错的地方......