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Task #544357 » UIObjectSliced.cpp

睿 赵, 2016-05-05 08:59 PM

 
#include "UIObjectSliced.h"

#pragma region Vertices_Define
/* uv(0, 0) xy(width, height) */
/* 0---1---2---3/ */
/* | \ | \ | \ |/ */
/* 4---5---6---7 */
/* | \ | \ | \ | */
/* 8---9---10--11 */
/* | \ | \ | \ | */
/* 12--13--14--15 */
/* xy(0, 0) uv(1, 1) */
#define GenVertices() \
{ \
/* Positions */ /* Texture Coords */\
0, height, 0.0f, 0.0f, /*0*/\
sliceX1, height, sliceU1, 0.0f, /*1*/\
width - sliceX2, height, sliceU2, 0.0f, /*2*/\
width, height, 1.0f, 0.0f, /*3*/\
\
0, height - sliceY2, 0.0f, sliceV1, /*4*/\
sliceX1, height - sliceY2, sliceU1, sliceV1, /*5*/\
width - sliceX2, height - sliceY2, sliceU2, sliceV1, /*6*/\
width, height - sliceY2, 1.0f, sliceV1, /*7*/\
\
0, sliceY1, 0.0f, sliceV2, /*8*/\
sliceX1, sliceY1, sliceU1, sliceV2, /*9*/\
width - sliceX2, sliceY1, sliceU2, sliceV2, /*10*/\
width, sliceY1, 1.0f, sliceV2, /*11*/\
\
0, 0, 0.0f, 1.0f, /*12*/\
sliceX1, 0, sliceU1, 1.0f, /*13*/\
width - sliceX2, 0, sliceU2, 1.0f, /*14*/\
width, 0, 1.0f, 1.0f /*15*/\
}\

#pragma endregion

//-- Constructor
UIObjectSliced::UIObjectSliced(char* name, char* imagePath, GLuint width, GLuint height, GLuint program)
{
this->name = name;
this->width = width;
this->height = height;
this->program = program;

genTexture(imagePath);
genBuffer();

std::cout << name << " Created!" << std::endl;
}
//-- Constructor
UIObjectSliced::UIObjectSliced(char* name, char* imagePath, GLuint width, GLuint height, GLint xPos, GLint yPos, GLuint program)
{
new(this) UIObjectSliced(name, imagePath, width, height, program);
setLocalPosition(xPos, yPos);
}
//-- Constructor
UIObjectSliced::UIObjectSliced(char* name, char* imagePath, GLuint width, GLuint height, UIAlignmentEnum align, GLint offsetX, GLint offsetY, GLuint program)
{
new(this) UIObjectSliced(name, imagePath, width, height, program);
setAlignment(align, offsetX, offsetY);
}

void UIObjectSliced::setSlice(float sliceU1, float sliceU2, float sliceV1, float sliceV2)
{
this->sliceU1 = sliceU1; this->sliceX1 = width * sliceU1;
this->sliceU2 = sliceU2; this->sliceX2 = width * (1 - sliceU2);
this->sliceV1 = sliceV1; this->sliceY1 = height * (1 - sliceV2);
this->sliceV2 = sliceV2; this->sliceY2 = height * sliceV1;
GLfloat vertices[] = GenVertices();
glBindVertexArray(VAO);
glBindBuffer(GL_ARRAY_BUFFER, VBO);
glBufferSubData(GL_ARRAY_BUFFER, 0, sizeof vertices, vertices);
glBindVertexArray(0);
}

void UIObjectSliced::setSize(int width, int height)
{
this->width = width;
this->height = height;
GLfloat vertices[] = GenVertices();
glBindVertexArray(VAO);
glBindBuffer(GL_ARRAY_BUFFER, VBO);
glBufferSubData(GL_ARRAY_BUFFER, 0, sizeof vertices, vertices);
glBindVertexArray(0);
}

void UIObjectSliced::genBuffer()
{
GLfloat vertices[] = GenVertices();
GLuint indeces[] = {
0, 4, 5, 0, 5, 1,
1, 5, 6, 1, 6, 2,
2, 6, 7, 2, 7, 3,
4, 8, 9, 4, 9, 5,
5, 9,10, 5,10, 6,
6,10,11, 6,11, 7,
8,12,13, 8,13, 9,
9,13,14, 9,14,10,
10,14,15, 10,15,11
};
indecesNum = sizeof (indeces) / sizeof (GLuint);


// Bind VAO
GLuint EBO;
glGenVertexArrays(1, &VAO);
glGenBuffers(1, &VBO);
glGenBuffers(1, &EBO);

glBindVertexArray(VAO);

glBindBuffer(GL_ARRAY_BUFFER, VBO);
glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STREAM_DRAW);

glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, EBO);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(indeces), indeces, GL_STATIC_DRAW);

glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 4 * sizeof(GLfloat), (GLvoid*)0);
glEnableVertexAttribArray(0);
glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 4 * sizeof(GLfloat), (GLvoid*)(2 * sizeof(GLfloat)));
glEnableVertexAttribArray(1);

glBindVertexArray(0);
}
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