我正在尝试使用OpenGL在C ++中制作体素地形生成器，代码正确添加元素，但有些未显示。我检查了它们是否超出了屏幕范围，但事实并非如此。构建多维数据集的代码是。
CubeData createCube(float x, float y, float z, float size) {
float r = (float) (rand() % 255 + 1);
float g = (float)(rand() % 255 + 1);
float b = (float)(rand() % 255 + 1);
float a = 1.0f;
if (r > 1.0f)
r = 100.0f / r;
if (g > 1.0f)
g = 100.0f / g;
if (b > 1.0f)
b = 100.0f / b;
std::vector<GLfloat> _cube_verts = {
-size + x, -size + y, size + z,
size + x, -size + y, size + z,
size + x, size + y, size + z,
-size + x, size + y, size + z,
-size + x, -size + y, -size + z,
size + x, -size + y, -size + z,
size + x, size + y, -size + z,
-size + x, size + y, -size + z
};
std::vector<unsigned int> _indices = {
// front
last_verts_len, (last_verts_len + 1), (last_verts_len + 2),
(last_verts_len + 2), (last_verts_len + 3), last_verts_len,
// top
(last_verts_len + 3), (last_verts_len + 2), (last_verts_len + 6),
(last_verts_len + 6), (last_verts_len + 7), (last_verts_len + 3),
// back
(last_verts_len + 7), (last_verts_len + 6), (last_verts_len + 5),
(last_verts_len + 5), (last_verts_len + 4), (last_verts_len + 7),
// bottom
(last_verts_len + 4), (last_verts_len + 5), (last_verts_len + 1),
(last_verts_len + 1), last_verts_len, (last_verts_len + 4),
// left
(last_verts_len + 4), last_verts_len, (last_verts_len + 3),
(last_verts_len + 3), (last_verts_len + 7), (last_verts_len + 4),
// right
(last_verts_len + 1), (last_verts_len + 5), (last_verts_len + 6),
(last_verts_len + 6), (last_verts_len + 2), (last_verts_len + 1)
};
std::vector<GLfloat> _colors = {
r, g, b, a,
r, g, b, a,
r, g, b, a,
r, g, b, a,
r, g, b, a,
r, g, b, a,
r, g, b, a,
r, g, b, a,
r, g, b, a,
r, g, b, a,
r, g, b, a,
r, g, b, a,
r, g, b, a,
r, g, b, a,
r, g, b, a,
r, g, b, a,
r, g, b, a,
r, g, b, a,
r, g, b, a,
r, g, b, a,
r, g, b, a,
r, g, b, a,
r, g, b, a,
r, g, b, a
};
CubeData data;
data.verts = _cube_verts;
data.inds = _indices;
data.colors = _colors;
last_verts_len += _cube_verts.size();
cubeIndex++;
return data;
}
添加和分配多维数据集的代码是
void Recalibrated::Init() {
camera = PerspectiveCamera(75.0f, (float)GameApplication::GetWidth() / (float)GameApplication::GetHeight(), 0.01f, 2000.0f);
camera.Translate(0.0f, 0.0f, 16.0f * 8.0f * 2.0f);
shader = Shader("../Recalibrated/vertex.glsl", "../Recalibrated/frag.glsl");
std::vector<GLfloat> verts;
std::vector<unsigned int> inds;
std::vector<GLfloat> colors;
CubeData cube1 = createCube(10 * 8, 0, 0, 4);
appendFloatVector(&verts, cube1.verts);
appendFloatVector(&colors, cube1.colors);
appendUnsignedIntVector(&inds, cube1.inds);
CubeData cube2 = createCube(10 * 8, 0, 0, 4);
appendFloatVector(&verts, cube2.verts);
appendFloatVector(&colors, cube2.colors);
appendUnsignedIntVector(&inds, cube2.inds);
//int x, y, z;
//for (x = 0; x < 32; x++) {
//}
drawer = VAODrawer();
drawer.SetVerticesWithIndicesAndColors(verts, inds, colors);
drawer.Init();
glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_LESS);
}
CubeData只是一个包含三个向量的结构。并且两个append*函数只是插入到向量的末尾。
任何帮助？
编辑：
我忘记了VAODrawer课程。这可能很重要，因此代码是。
#include "VAODrawer.h"
void VAODrawer::SetVerticesWithIndicesAndColors(std::vector<GLfloat> verts, std::vector<GLuint> indices, std::vector<GLfloat> colors) {
this->_VERTS = std::vector<GLfloat>(verts);
this->_INDICES = std::vector<unsigned int>(indices);
this->_COLORS = std::vector<GLfloat>(colors);
}
void VAODrawer::Init() {
_MODEL_MATRIX = glm::mat4(1.0f);
if (_VAO_ID == -1 && _VBO_VERT_ID == -1 && _VBO_COL_ID == -1 && _VAO_ID == -1 && _VERTS.size() != 0 && _INDICES.size() != 0 && _COLORS.size() != 0)
{
glGenVertexArrays(1, &_VAO_ID);
glGenBuffers(1, &_VBO_VERT_ID);
glGenBuffers(1, &_VBO_COL_ID);
glGenBuffers(1, &_IND_ID);
glBindVertexArray(_VAO_ID);
glBindBuffer(GL_ARRAY_BUFFER, _VBO_VERT_ID);
glBufferData(GL_ARRAY_BUFFER, _VERTS.size() * sizeof(GLfloat), _VERTS.data(), GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, _VBO_COL_ID);
glBufferData(GL_ARRAY_BUFFER, _COLORS.size() * sizeof(GLfloat), _COLORS.data(), GL_STATIC_DRAW);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, _IND_ID);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, _INDICES.size() * sizeof(GLuint), &_INDICES[0], GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, _VBO_VERT_ID);
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 0, (void*)0);
glBindBuffer(GL_ARRAY_BUFFER, _VBO_COL_ID);
glVertexAttribPointer(1, 4, GL_FLOAT, GL_FALSE, 0, (void*)0);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glBindVertexArray(0);
printf(std::string("Ind length" + std::to_string(_INDICES.size()) + "\n").c_str());
}
}
const glm::mat4 VAODrawer::GetModelMatrix() {
return _MODEL_MATRIX;
}
void VAODrawer::Draw(const Camera& camera, Shader* shader) {
if (_VAO_ID != -1 && _VBO_VERT_ID != -1 && _VBO_COL_ID != -1) {
glBindVertexArray(_VAO_ID);
glBindBuffer(GL_ARRAY_BUFFER, _VBO_VERT_ID);
glEnableVertexAttribArray(0);
glBindBuffer(GL_ARRAY_BUFFER, _VBO_COL_ID);
glEnableVertexAttribArray(1);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, _IND_ID);
shader->UniformMatrix4("MVPMatrix", (camera.GetProjectionMatrix() * camera.GetViewMatrix() * GetModelMatrix()));
glDrawElements(GL_TRIANGLES, _INDICES.size(), GL_UNSIGNED_INT, (void*)0);
glDisableVertexAttribArray(0);
glDisableVertexAttribArray(1);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glBindVertexArray(0);
}
else {
this->Init();
}
}
void VAODrawer::Rotate(float x, float y, float z) {
_MODEL_MATRIX = glm::rotate(_MODEL_MATRIX, x, glm::vec3(1, 0, 0));
_MODEL_MATRIX = glm::rotate(_MODEL_MATRIX, y, glm::vec3(0, 1, 0));
_MODEL_MATRIX = glm::rotate(_MODEL_MATRIX, z, glm::vec3(0, 0, 1));
}
void VAODrawer::Dispose() {
glDeleteBuffers(1, &_VBO_VERT_ID);
glDeleteBuffers(1, &_VBO_COL_ID);
glDeleteBuffers(1, &_IND_ID);
glDeleteVertexArrays(1, &_VAO_ID);
}
答案 0 :(得分：0)
我弄清楚问题是什么。我认为指数被每个顶点的浮点数偏移，而不是顶点的实际数量。更改偏移量以添加8（实际顶点的数量）使所有立方体显示。