void Z3DImage2DRenderer::addQuad(const Z3DTriangleList &quad)
{
if (quad.empty() ||
(quad.getVertices().size() != 4 && quad.getVertices().size() != 6) ||
quad.getVertices().size() != quad.get2DTextureCoordinates().size()) {
LERROR() << "Input quad should be 2D slice with 2D texture coordinates";
return;
}
m_quads.push_back(quad);
}
void Z3DPrimitiveRenderer::renderTriangleList(const Z3DShaderProgram &shader, const Z3DTriangleList &mesh)
{
if (mesh.empty() || !shader.isLinked())
return;
const std::vector<glm::vec3>& vertices = mesh.getVertices();
const std::vector<float>& textureCoordinates1D = mesh.get1DTextureCoordinates();
const std::vector<glm::vec2>& textureCoordinates2D = mesh.get2DTextureCoordinates();
const std::vector<glm::vec3>& textureCoordinates3D = mesh.get3DTextureCoordinates();
const std::vector<glm::vec3>& normals = mesh.getNormals();
const std::vector<glm::vec4>& colors = mesh.getColors();
const std::vector<GLuint>& triangleIndexes = mesh.getIndices();
GLenum type = mesh.getTriangleListType();
if (m_hardwareSupportVAO) {
glBindVertexArray(m_privateVAO);
}
GLint attr_vertex = shader.attributeLocation("attr_vertex");
GLint attr_1dTexCoord0 = shader.attributeLocation("attr_1dTexCoord0");
GLint attr_2dTexCoord0 = shader.attributeLocation("attr_2dTexCoord0");
GLint attr_3dTexCoord0 = shader.attributeLocation("attr_3dTexCoord0");
GLint attr_normal = shader.attributeLocation("attr_normal");
GLint attr_color = shader.attributeLocation("attr_color");
GLsizei bufObjectsSize = 1; // vertex
if (attr_1dTexCoord0 != -1 && !textureCoordinates1D.empty())
bufObjectsSize++;
if (attr_2dTexCoord0 != -1 && !textureCoordinates2D.empty())
bufObjectsSize++;
if (attr_3dTexCoord0 != -1 && !textureCoordinates3D.empty())
bufObjectsSize++;
if (attr_normal != -1 && !normals.empty())
bufObjectsSize++;
if (attr_color != -1 && !colors.empty())
bufObjectsSize++;
if (!triangleIndexes.empty())
bufObjectsSize++;
GLuint *bufObjects = new GLuint[bufObjectsSize];
glGenBuffers(bufObjectsSize, bufObjects);
int bufIdx = 0;
glEnableVertexAttribArray(attr_vertex);
glBindBuffer(GL_ARRAY_BUFFER, bufObjects[bufIdx++]);
glBufferData(GL_ARRAY_BUFFER, vertices.size()*3*sizeof(GLfloat), &(vertices[0]), GL_STATIC_DRAW);
glVertexAttribPointer(attr_vertex, 3, GL_FLOAT, GL_FALSE, 0, 0);
if (attr_1dTexCoord0 != -1 && !textureCoordinates1D.empty()) {
glEnableVertexAttribArray(attr_1dTexCoord0);
glBindBuffer(GL_ARRAY_BUFFER, bufObjects[bufIdx++]);
glBufferData(GL_ARRAY_BUFFER, textureCoordinates1D.size()*1*sizeof(GLfloat), &(textureCoordinates1D[0]), GL_STATIC_DRAW);
glVertexAttribPointer(attr_1dTexCoord0, 1, GL_FLOAT, GL_FALSE, 0, 0);
}
if (attr_2dTexCoord0 != -1 && !textureCoordinates2D.empty()) {
glEnableVertexAttribArray(attr_2dTexCoord0);
glBindBuffer(GL_ARRAY_BUFFER, bufObjects[bufIdx++]);
glBufferData(GL_ARRAY_BUFFER, textureCoordinates2D.size()*2*sizeof(GLfloat), &(textureCoordinates2D[0]), GL_STATIC_DRAW);
glVertexAttribPointer(attr_2dTexCoord0, 2, GL_FLOAT, GL_FALSE, 0, 0);
}
if (attr_3dTexCoord0 != -1 && !textureCoordinates3D.empty()) {
glEnableVertexAttribArray(attr_3dTexCoord0);
glBindBuffer(GL_ARRAY_BUFFER, bufObjects[bufIdx++]);
glBufferData(GL_ARRAY_BUFFER, textureCoordinates3D.size()*3*sizeof(GLfloat), &(textureCoordinates3D[0]), GL_STATIC_DRAW);
glVertexAttribPointer(attr_3dTexCoord0, 3, GL_FLOAT, GL_FALSE, 0, 0);
}
if (attr_normal != -1 && !normals.empty()) {
glEnableVertexAttribArray(attr_normal);
glBindBuffer(GL_ARRAY_BUFFER, bufObjects[bufIdx++]);
glBufferData(GL_ARRAY_BUFFER, normals.size()*3*sizeof(GLfloat), &(normals[0]), GL_STATIC_DRAW);
glVertexAttribPointer(attr_normal, 3, GL_FLOAT, GL_FALSE, 0, 0);
}
if (attr_color != -1 && !colors.empty()) {
glEnableVertexAttribArray(attr_color);
glBindBuffer(GL_ARRAY_BUFFER, bufObjects[bufIdx++]);
glBufferData(GL_ARRAY_BUFFER, colors.size()*4*sizeof(GLfloat), &(colors[0]), GL_STATIC_DRAW);
glVertexAttribPointer(attr_color, 4, GL_FLOAT, GL_FALSE, 0, 0);
}
if (triangleIndexes.empty()) {
glDrawArrays(type, 0, vertices.size());
} else {
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, bufObjects[bufIdx++]);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, triangleIndexes.size()*sizeof(GLuint), &(triangleIndexes[0]), GL_STATIC_DRAW);
glDrawElements(type, triangleIndexes.size(), GL_UNSIGNED_INT, 0);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
}
glBindBuffer(GL_ARRAY_BUFFER, 0);
glDeleteBuffers(bufObjectsSize, bufObjects);
delete bufObjects;
glDisableVertexAttribArray(attr_vertex);
if (attr_1dTexCoord0 != -1 && !textureCoordinates1D.empty())
glDisableVertexAttribArray(attr_1dTexCoord0);
if (attr_2dTexCoord0 != -1 && !textureCoordinates2D.empty())
glDisableVertexAttribArray(attr_2dTexCoord0);
if (attr_3dTexCoord0 != -1 && !textureCoordinates3D.empty())
glDisableVertexAttribArray(attr_3dTexCoord0);
if (attr_normal != -1 && !normals.empty())
glDisableVertexAttribArray(attr_normal);
if (attr_color != -1 && !colors.empty())
glDisableVertexAttribArray(attr_color);
if (m_hardwareSupportVAO) {
glBindVertexArray(0);
}
}