void Object::BuildTriangleStrip(const GLuint& perRow, const GLuint& perColumn) {
/*
0, 1 1, 1 | 2, 1 3, 1
0, 0 1, 0 | 2, 0 3, 0
|
0, 0 1, 0 | 2, 0 3, 0
0,-1 1,-1 | 2,-1 3,-1
*/
int numValuesPerRow = (2 + (2 * perRow)) *3, numDegenValues = 2 * 3;
uint numValues = (numValuesPerRow + numDegenValues) * perColumn;
GLfloat *vertices = new GLfloat[numValues];
// TODO
memset(vertices, 0, sizeof(GLfloat) * numValues);
for(int i = 0, x = 0, y = 0; i < numValues; ++x) {
vertices[i] = x;
vertices[++i] = y + 1;
vertices[++i] = 0;
vertices[++i] = x;
vertices[++i] = y;
vertices[++i] = 0;
if((++i) % numValuesPerRow == 0) {
vertices[i] = x;
vertices[++i] = y;
vertices[++i] = 0;
vertices[++i] = x;
vertices[++i] = y;
vertices[++i] = 0;
numValuesPerRow += numDegenValues;
i +=1;
x = -1;
--y;
}
}
/*GLfloat *vertices = new GLfloat[numVertices];
vertices[0] = 0.0f; vertices[1] = 1.0f; vertices[2] = 0.0f;
vertices[3] = 0.0f; vertices[4] = 0.0f; vertices[5] = 0.0f;
vertices[6] = 1.0f; vertices[7] = 1.0f; vertices[8] = 0.0f;
vertices[9] = 1.0f; vertices[10] = 0.0f; vertices[11] = 0.0f;
vertices[12] = 1.0f; vertices[13] = 0.0f; vertices[14] = 0.0f;
vertices[15] = 1.0f; vertices[16] = 0.0f; vertices[17] = 0.0f;
vertices[18] = 0.0f; vertices[19] = 0.0f; vertices[20] = 0.0f;
vertices[21] = 0.0f; vertices[22] = -1.0f; vertices[23] = 0.0f;
vertices[24] = 1.0f; vertices[25] = 0.0f; vertices[26] = 0.0f;
vertices[27] = 1.0f; vertices[28] = -1.0f; vertices[29] = 0.0f;*/
numIndices = numValues/3;
this->renderMode = GL_TRIANGLE_STRIP;
LoadTriangles(vertices, vertices);
delete [] vertices;
}
void Plane::BuildTriangles(const GLuint& perRow, const GLuint& perColumn){
static bool built = false;
if(built){
fprintf(stderr, "Failed to build triangles. Object already built!\n");
return;
}
built = true;
int numValuesPerRow = 18 * perRow;
int numValues = 18 * perRow * perColumn;
GLfloat *vertices = new GLfloat[numValues];
for(int i = 0, x = 0, y = 0; i < numValues; ++x){
vertices[i] = x + 0.0f; vertices[++i] = y + 1.0f; vertices[++i] = 0.0f;
vertices[++i] = x + 0.0f; vertices[++i] = y + 0.0f; vertices[++i] = 0.0f;
vertices[++i] = x + 1.0f; vertices[++i] = y + 1.0f; vertices[++i] = 0.0f;
vertices[++i] = x + 1.0f; vertices[++i] = y + 0.0f; vertices[++i] = 0.0f;
vertices[++i] = x + 1.0f; vertices[++i] = y + 1.0f; vertices[++i] = 0.0f;
vertices[++i] = x + 0.0f; vertices[++i] = y + 0.0f; vertices[++i] = 0.0f;
if(++i % numValuesPerRow == 0){
x = -1; --y;
}
}
int numUvValuesPerRow = 12 * perRow;
int numUvValues = 12 * perRow * perColumn;
GLfloat *uvs = new GLfloat[numUvValues];
for(int i = 0, u = 0, v = 0; i < numUvValues; ++u){
uvs[i] = u + 0.625f; uvs[++i] = -v - 0.9166f;
uvs[++i] = u + 0.625f; uvs[++i] = -v - 1.0f;
uvs[++i] = u + 0.6875f; uvs[++i] = -v - 0.9166f;
uvs[++i] = u + 0.6875f; uvs[++i] = -v - 1.0f;
uvs[++i] = u + 0.6875f; uvs[++i] = -v - 0.9166f;
uvs[++i] = u + 0.625f; uvs[++i] = -v - 1.0f;
if(++i % numUvValuesPerRow == 0){
u = -1; ++v;
}
}
mNumUVs = numUvValues/2;
mNumIndices = numValues/3;
mRenderMode = GL_TRIANGLES;
LoadTriangles(vertices, uvs);
}
void Object::BuildTriangles(const GLuint& perRow, const GLuint& perColumn) {
int numValuesPerRow = 18 * perRow;
int numValues = 18 * perRow * perColumn;
GLfloat *vertices = new GLfloat[numValues];
for(int i = 0, x = 0, y = 0; i < numValues; ++x) {
vertices[i] = x;
vertices[++i] = y + 1;
vertices[++i] = 0;
vertices[++i] = x;
vertices[++i] = y;
vertices[++i] = 0;
vertices[++i] = x + 1;
vertices[++i] = y + 1;
vertices[++i] = 0;
vertices[++i] = x + 1;
vertices[++i] = y;
vertices[++i] = 0;
vertices[++i] = x + 1;
vertices[++i] = y + 1;
vertices[++i] = 0;
vertices[++i] = x;
vertices[++i] = y;
vertices[++i] = 0;
if(++i % numValuesPerRow == 0) {
x = -1;
--y;
}
}
int numUvValuesPerRow = 12 * perRow;
int numUvValues = 12 * perRow * perColumn;
GLfloat *uvs = new GLfloat[numUvValues];
for(int i = 0, u = 0, v = 0; i < numUvValues; ++u) {
uvs[i] = u + 0.625f;
uvs[++i] = -v - 0.9166;
uvs[++i] = u + 0.625f;
uvs[++i] = -v - 1;
uvs[++i] = u + 0.6875f;
uvs[++i] = -v - 0.9166;
uvs[++i] = u + 0.6875f;
uvs[++i] = -v - 1;
uvs[++i] = u + 0.6875f;
uvs[++i] = -v - 0.9166;
uvs[++i] = u + 0.625f;
uvs[++i] = -v - 1;
if(++i % numUvValuesPerRow == 0) {
u = -1;
++v;
}
}
//0,1
//0,0
//U: 0.625 - 0.0625 0.625
//V: 1 - 0.0833 0.625 - 0.0833
//U: 0.625 - 0.0625 0.625
//V: 1 1
numUVs = numUvValues/2;
numIndices = numValues/3;
this->renderMode = GL_TRIANGLES;
LoadTriangles(vertices, uvs);
delete [] vertices;
delete [] uvs;
}
