ktyl
441a0748d1
split render logic across objects move rendering code from main loop to Orbiter make objects responsible for setting up their own render contexts
53 lines
1.3 KiB
C++
53 lines
1.3 KiB
C++
#include "widget.hpp"
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#include "gfx.hpp"
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Widget::Widget(GLuint shaderProgram) :
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_shaderProgram(shaderProgram)
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{
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const float lineLength = 0.1;
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for (int i = 0; i < 3*6; i++)
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{
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_vertices[i] *= _lineLength;
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}
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glGenVertexArrays(1, &_vao);
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glGenBuffers(1, &_vbo);
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glBindVertexArray(_vao);
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glBindBuffer(GL_ARRAY_BUFFER, _vbo);
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size_t v3Size = 3 * sizeof(float);
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size_t lineSize = 2 * sizeof(float);
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size_t vboBufferSize = v3Size * lineSize * 3;
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glBufferData(GL_ARRAY_BUFFER, vboBufferSize, &_vertices[0], GL_STATIC_DRAW);
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glEnableVertexAttribArray(0);
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glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 3 * sizeof(float), (void*)0);
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glBindBuffer(GL_ARRAY_BUFFER, 0);
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glBindVertexArray(0);
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}
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void Widget::render(const float time)
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{
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glUseProgram(_shaderProgram);
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updateModelViewProjectionMatrix(_shaderProgram, time);
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GLint modelLocation = getShaderUniformLocation(_shaderProgram, "_Model");
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glUniformMatrix4fv(modelLocation, 1, GL_FALSE, &_modelMatrix[0][0]);
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glBindVertexArray(_vao);
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glBindBuffer(GL_ARRAY_BUFFER, _vbo);
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glDrawArrays(GL_LINES, 0, 6);
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}
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void Widget::setModelMatrix(const glm::mat4 matrix)
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{
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_modelMatrix = matrix;
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}
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Widget::~Widget()
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{
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glDeleteVertexArrays(1, &_vao);
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glDeleteBuffers(1, &_vbo);
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}
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