LineGrid::LineGrid(int xCount, float deltaX, float offsetX, int yCount, float deltaY, float offsetY) :
Object3D(), lineWidth(1.0f)
{
int elementCount = (xCount + yCount) * 2;
int vertexCount = elementCount * 6;
GLfloat* vertices = new GLfloat[ vertexCount ];
float endX = offsetX * 2 + deltaX * (xCount - 1);
float endY = offsetY * 2 + deltaY * (yCount - 1);
for (int i = 0; i < xCount; i++) {
float x = offsetX + deltaX * i;
fillData(&vertices[(i * 2) * 6], { x,0.0f,0.0f }, { 0.0f,x/endX,1.0f }); // Start
fillData(&vertices[(i * 2 +1) * 6], { x,endY,0.0f }, { 0.0f,1.0f,1.0f }); // End
}
int indexOffset = xCount * 2 * 6;
int elementIndexOffset = xCount * 2;
for (int i = 0; i < yCount; i++) {
float y = offsetY + deltaY * i;
fillData(&vertices[indexOffset + (i * 2) * 6], { 0.0f,y,0.0f }, { 1.0f,y/endY,0.0f }); // Start
fillData(&vertices[indexOffset + (i * 2 + 1) * 6], { endX,y,0.0f }, { 1.0f,1.0f,0.0f }); // End
}
GLuint* elements = new GLuint[elementCount];
for (int i = 0; i < elementCount; i++) {
elements[i] = i;
}
initializeVBO(vertices, vertexCount * sizeof(GLfloat), elements, elementCount * sizeof(GLuint), GL_LINES);
delete[] vertices;
delete[] elements;
}
LineGrid::LineGrid( float length, float lineWidth ) :
Object3D(), lineWidth(lineWidth)
{
int elementCount = 18;
int vertexCount = 12 * 6;
GLfloat* vertices = new GLfloat[vertexCount];
GLuint* elements = new GLuint[elementCount];
float arrowEnd = length * 0.9f;
float arrowOffset = length * 0.07f;
// x-Axis
fillData(&vertices[0], { -length,0.0f,0.0f }, { 1.0,0.0f,0.0f });
fillData(&vertices[1*6], { length,0.0,0.0f }, { 1.0f,0.0f,0.0f });
fillData(&vertices[2*6], { arrowEnd,0.0f,arrowOffset }, { 1.0,0.0f,0.0f });
fillData(&vertices[3*6], { arrowEnd,0.0f,-arrowOffset }, { 1.0f,0.0f,0.0f });
elements[0] = 0;
elements[1] = 1;
elements[2] = 1;
elements[3] = 2;
elements[4] = 1;
elements[5] = 3;
// y-Axis
fillData(&vertices[4*6], { 0.0f,-length,0.0f }, { 0.0,1.0f,0.0f });
fillData(&vertices[5*6], { 0.0f,length,0.0f }, { 0.0f,1.0f,0.0f });
fillData(&vertices[6*6], { arrowOffset,arrowEnd,0.0f }, { 0.0,1.0f,0.0f });
fillData(&vertices[7*6], { -arrowOffset,arrowEnd,0.0f }, { 0.0f,1.0f,0.0f });
elements[6] = 4;
elements[7] = 5;
elements[8] = 5;
elements[9] = 6;
elements[10] = 5;
elements[11] = 7;
// z-Axis
fillData(&vertices[8*6], { 0.0f,0.0f,-length }, { 0.0,0.0f,1.0f });
fillData(&vertices[9*6], { 0.0f,0.0f,length }, { 0.0f,0.0f,1.0f });
fillData(&vertices[10*6], { 0.0f,arrowOffset,arrowEnd }, { 0.0,0.0f,1.0f });
fillData(&vertices[11*6], { 0.0f,-arrowOffset,arrowEnd }, { 0.0f,0.0f,1.0f });
elements[12] = 8;
elements[13] = 9;
elements[14] = 9;
elements[15] = 10;
elements[16] = 9;
elements[17] = 11;
initializeVBO(vertices, vertexCount * sizeof(GLfloat), elements, elementCount * sizeof(GLuint), GL_LINES);
delete[] vertices;
delete[] elements;
}
void TriangleWindow::initialize()
{
initializeLighting();
glClearColor(0.0f,0.21f,0.21f,1.0f);
glColor3f(1.0f,1.0f,1.0f);
glEnable(GL_DEPTH_TEST); //Z-Buffer
glDepthFunc(GL_LEQUAL); // Lesser or Equals
glEnable(GL_CULL_FACE);
glShadeModel(GL_SMOOTH);
initializeShaders();
initializeTextures();
initializeVBO();
// glEnable(GL_TEXTURE_2D);
}
