glDrawElements錯誤：nvoglv32.dll OpenGL

Question

我知道，這個錯誤意味着最經常的錯誤地啓用頂點屬性數組。但我不明白我的錯誤。 我試試這個代碼轉換從Java到C++：地形code 部分：

RawModel Terrain::generateTerrain(Loader loader) 
{ 
auto count = VERTEX_COUNT * VERTEX_COUNT; 
std::vector<GLfloat> vertices(count * 3); 
std::vector<GLfloat> normals(count * 3); 
std::vector<GLfloat> textureCoords(count * 2); 
std::vector<GLuint> indices(6 * (VERTEX_COUNT - 1)*(VERTEX_COUNT - 1)); 

... 

return loader.loadToVao(vertices, normals, textureCoords, indices); 
} 

裝載機類：

RawModel Loader::loadToVao(vector<GLfloat > positions, vector<GLfloat > texCoords, vector<GLfloat > normals, vector<GLuint> indices) { 
    GLuint VAOid = createVAO(); 
    bindIndicesBuffer(indices); 
    storeDataInAttributeList(0, 3, positions); 
    storeDataInAttributeList(1, 2, texCoords); 
    storeDataInAttributeList(2, 3, normals); 
    glBindVertexArray(0); 

    return RawModel(VAOid, size(indices)); 
} 

GLuint Loader::createVAO() { 
    GLuint VAOid; 
    glGenVertexArrays(1, &VAOid); 
    glBindVertexArray(VAOid); 
    vaos.push_back(VAOid); 

    return VAOid; 
} 

void Loader::bindIndicesBuffer(vector<GLuint> indices) { 
    GLuint VBOid; 
    glGenBuffers(1, &VBOid); 
    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, VBOid); 
    glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(indices), &indices, GL_STATIC_DRAW); 
    vbos.push_back(VBOid); 
    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0); 
} 

void Loader::storeDataInAttributeList(int attributeNumber, int coordinateSize, vector<GLfloat> &data)  { 
    GLuint VBOid; 
    glGenBuffers(1, &VBOid); 
    glBindBuffer(GL_ARRAY_BUFFER, VBOid); 
    glBufferData(GL_ARRAY_BUFFER, sizeof(data), &data, GL_STATIC_DRAW); 
    glEnableVertexAttribArray(attributeNumber); 
    glVertexAttribPointer(attributeNumber, coordinateSize, GL_FLOAT, GL_FALSE, coordinateSize*sizeof(GLfloat), (GLvoid*)(sizeof(data))); 
    vbos.push_back(VBOid); 
    glBindBuffer(GL_ARRAY_BUFFER, 0); 
} 

主要週期：

terrainShader.Use(); 
     terrainShader.loadUniformMatrix4FVector("projection", 1, glm::value_ptr(projection)); 
     terrainShader.loadUniformMatrix4FVector("view", 1, glm::value_ptr(view)); 
     modelMatrix = glm::translate(modelMatrix, glm::vec3(0.0f, -5.00f, 0.0f)); 
     terrainShader.loadUniformMatrix4FVector("model", 1, glm::value_ptr(modelMatrix)); 
     terrainShader.loadUniformFVector("lightPos", &lightPos[0]); 
     for (auto terrain : terrains) { 
      RawModel rawModel = terrain.getModel(); 

      glBindVertexArray(rawModel.getVAOid()); 
      glEnableVertexAttribArray(0); 
      glEnableVertexAttribArray(1); 
      glEnableVertexAttribArray(2); 
terrainShader.loadUniformInt1("material.diffuse", 0);   
     terrainShader.loadUniformFloat1("material.shininess", 64.0f); 
     glUniform3f(glGetUniformLocation(terrainShader.ShaderProgramID, "light.direction"), -0.2f, -1.0f, -0.3f); 
     glUniform3f(glGetUniformLocation(terrainShader.ShaderProgramID, "light.ambient"), 0.2f, 0.2f, 0.2f); 
     glUniform3f(glGetUniformLocation(terrainShader.ShaderProgramID, "light.diffuse"), 0.5f, 0.5f, 0.5f); 
     glUniform3f(glGetUniformLocation(terrainShader.ShaderProgramID, "light.specular"), 1.0f, 1.0f, 1.0f); 

      terrainShader.loadUniformMatrix4FVector("model", 1, glm::value_ptr(modelMatrix)); 
      glDrawElements(GL_TRIANGLES, rawModel.getVertexCount(), GL_UNSIGNED_INT, 0); 
     } 

着色器： 頂點：

#version 400 core 
layout (location = 0) in vec3 Position_model; 
layout (location = 1) in vec2 _texCoord; 
layout (location = 2) in vec3 normal;  
out vec2 TexCoords; 
out vec3 toLightVector; 
out vec3 surfaceNormal;  

uniform mat4 model; 
uniform mat4 view; 
uniform mat4 projection; 
uniform vec3 lightPos; 

void main() 
{ 
    vec4 worldPosition = model * vec4(Position_model, 1.0); 
    gl_Position = projection * view * worldPosition ; 
    TexCoords = _texCoord;  
    surfaceNormal = mat3(transpose(inverse(model))) * normal; 
    toLightVector = lightPos - worldPosition.xyz;  
} 

片段：

#version 400 core  
struct Material { 
    sampler2D diffuse;   
    float  shininess; 
};  
struct Light {  
    vec3 direction;  
    vec3 ambient; 
    vec3 diffuse; 
    vec3 specular; 
}; 

in vec2 TexCoords; 
in vec3 toLightVector; 
in vec3 surfaceNormal; 

out vec4 o_color; 

uniform Material material; 
uniform Light light;  
void main() 
{ 
    // Ambient 
    vec3 ambient = light.ambient * vec3(texture(material.diffuse, TexCoords)); 

    // Diffuse 
    vec3 norm = normalize(surfaceNormal); 
    vec3 lightDir = normalize(-light.direction); 
    float diff = max(dot(norm, lightDir), 0.0); 
    vec3 diffuse = light.diffuse * diff * vec3(texture(material.diffuse, TexCoords)); 

    o_color = vec4(ambient + diffuse, 1.0f);  
} 

Answer 1

上傳數據的錯誤量到維也納組織。

在glBufferData呼叫

glBufferData(GL_ARRAY_BUFFER, sizeof(data), &data, GL_STATIC_DRAW); 

sizeof(data)是矢量對象的大小，而不是存儲在矢量中的數據的大小。與此類似，通過給出&data作爲內存地址，您將傳遞該向量的地址，而不是該向量管理的內存。你真正想要的是

glBufferData(GL_ARRAY_BUFFER, sizeof(GLfloat) * data.size(), data.data(), GL_STATIC_DRAW); 

同樣的事情也適用於索引數據。