好的,我能够翻译基础模型的顶点、纹理坐标和法线,并且能够顺利地渲染出来。
然而,当我尝试加入一些骨骼信息时,在着色器中尝试操纵骨骼数据时,骨骼数据似乎被损坏了(或其他什么问题?)。
以下是我的代码,用于将数据加载并渲染到OpenGL中(设置着色器并发送视图矩阵、世界矩阵等操作在另一个类中完成):
/*
* Mesh.cpp
*
* Created on: 2011-05-08
* Author: jarrett
*/
#include <boost/log/trivial.hpp>
#include "../common/utilities/AssImpUtilities.h"
#include "Mesh.h"
namespace glr {
namespace glw {
Mesh::Mesh(IOpenGlDevice* openGlDevice,
const std::string path,
std::vector< glm::vec3 > vertices,
std::vector< glm::vec3 > normals,
std::vector< glm::vec2 > textureCoordinates,
std::vector< glm::vec4 > colors,
std::vector<VertexBoneData > bones,
BoneData boneData)
: openGlDevice_(openGlDevice), vertices_(vertices), normals_(normals), textureCoordinates_(textureCoordinates), colors_(colors), bones_(bones), boneData_(boneData)
{
BOOST_LOG_TRIVIAL(debug) << "loading mesh into video memory...";
// create our vao
glGenVertexArrays(1, &vaoId_);
glBindVertexArray(vaoId_);
// create our vbos
glGenBuffers(5, &vboIds_[0]);
glBindBuffer(GL_ARRAY_BUFFER, vboIds_[0]);
glBufferData(GL_ARRAY_BUFFER, vertices_.size() * sizeof(glm::vec3), &vertices_[0], GL_STATIC_DRAW);
glEnableVertexAttribArray(0);
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 0, 0);
glBindBuffer(GL_ARRAY_BUFFER, vboIds_[1]);
glBufferData(GL_ARRAY_BUFFER, textureCoordinates_.size() * sizeof(glm::vec2), &textureCoordinates_[0], GL_STATIC_DRAW);
glEnableVertexAttribArray(1);
glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 0, 0);
glBindBuffer(GL_ARRAY_BUFFER, vboIds_[2]);
glBufferData(GL_ARRAY_BUFFER, normals_.size() * sizeof(glm::vec3), &normals_[0], GL_STATIC_DRAW);
glEnableVertexAttribArray(2);
glVertexAttribPointer(2, 3, GL_FLOAT, GL_FALSE, 0, 0);
std::cout << "SIZE: " << vertices_.size() << " " << sizeof(glm::ivec4) << " " << bones_.size() << " " << sizeof(VertexBoneData) << std::endl;
// Convert data into simple vectors, then send to OpenGL
std::vector< glm::ivec4 > boneIds = std::vector< glm::ivec4 >();
std::vector< glm::vec4 > weights = std::vector< glm::vec4 >();
for ( VertexBoneData& d : bones_ )
{
boneIds.push_back( d.boneIds );
weights.push_back( d.weights );
}
glBindBuffer(GL_ARRAY_BUFFER, vboIds_[3]);
glBufferData(GL_ARRAY_BUFFER, boneIds.size() * sizeof(glm::ivec4), &boneIds[0], GL_STATIC_DRAW);
glEnableVertexAttribArray(3);
glVertexAttribPointer(3, 4, GL_INT, GL_FALSE, 0, 0);
glBindBuffer(GL_ARRAY_BUFFER, vboIds_[4]);
glBufferData(GL_ARRAY_BUFFER, weights.size() * sizeof(glm::vec4), &weights[0], GL_STATIC_DRAW);
glEnableVertexAttribArray(4);
glVertexAttribPointer(4, 4, GL_FLOAT, GL_FALSE, 0, 0);
// Disable our Vertex Array Object
//glEnableVertexAttribArray(0);
// Disable our Vertex Buffer Object
glBindVertexArray(0);
GlError err = openGlDevice_->getGlError();
if (err.type != GL_NONE)
{
// TODO: throw error
BOOST_LOG_TRIVIAL(error) << "Error loading mesh in opengl";
BOOST_LOG_TRIVIAL(error) << "OpenGL error: " << err.name;
}
else
{
BOOST_LOG_TRIVIAL(debug) << "Successfully loaded mesh.";
}
}
Mesh::~Mesh()
{
}
void Mesh::render()
{
glBindVertexArray(vaoId_);
glDrawArrays(GL_TRIANGLES, 0, vertices_.size());
glBindVertexArray(0);
}
BoneData& Mesh::getBoneData()
{
return boneData_;
}
}
}
我实际使用的着色器代码是这样的:
#version 150 core
struct Light {
vec4 ambient;
vec4 diffuse;
vec4 specular;
vec4 position;
vec4 direction;
};
in vec3 in_Position;
in vec2 in_Texture;
in vec3 in_Normal;
in ivec4 in_BoneIds;
in vec4 in_BoneWeights;
out vec2 textureCoord;
out vec3 normalDirection;
out vec3 lightDirection;
out float bug;
layout(std140) uniform Lights
{
Light lights[ 1 ];
};
void main() {
gl_Position = pvmMatrix * vec4(in_Position, 1.0);
vec4 lightDirTemp = viewMatrix * lights[0].direction;
textureCoord = in_Texture;
//vec4 normalDirTemp = boneTransform * vec4(in_Normal, 1.0);
//normalDirection = normalize(normalMatrix * normalDirTemp.xyz);
normalDirection = normalize(normalMatrix * in_Normal);
lightDirection = normalize(vec3(lightDirTemp));
// If we have any bugs, should highlight the vertex red or green
bug = 0.0;
float sum = in_BoneWeights[0] + in_BoneWeights[1] + in_BoneWeights[2] + in_BoneWeights[3];
if (sum > 1.5f)
bug = 1.0;
else if (sum < 0.95f)
bug = 2.0;
// disable bug highlighting
//bug = 0.0;
}
如果
bug = 1.0
,则顶点将被着为红色,如果but = 2.0
,则顶点将被着为绿色。我现在看到所有的顶点都是红色的,这意味着sum
大于1.5f
。我已经确认每组权重的总和实际上小于或等于
<= 1.0f
...那么在着色器中为什么不是这种情况?有人发现我漏掉了什么明显的东西吗?
编辑:看起来我找到了问题-我没有在任何一个
in
变量上调用glBindAttribLocation
-在添加之后:glBindAttribLocation(programId_, 0, "in_Position");
glBindAttribLocation(programId_, 1, "in_Texture");
glBindAttribLocation(programId_, 2, "in_Color");
glBindAttribLocation(programId_, 3, "in_BoneIds");
glBindAttribLocation(programId_, 4, "in_BoneWeights");
对于我的着色器加载代码,它运行良好。奇怪的是-对于前三个(位置、纹理和颜色),我不需要这样做,它也可以正常工作。但是当我添加骨骼信息时,突然就需要这样做了……为什么呢?
glBindAttribLocation
调用。现在我的动画已经可以工作了!(在某种程度上 - 它似乎在某些地方消失了,所以我认为法线可能会出问题)。谢谢@Andon! - Jarrett