95 lines
2.2 KiB
C++
95 lines
2.2 KiB
C++
#ifndef OPENGLVERTEXARRAY_H
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#define OPENGLVERTEXARRAY_H
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#include "opengl_global.h"
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namespace paysages {
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namespace opengl {
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/**
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* Vertex arrays storage and binding, to render triangles.
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*
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* This will handle VAOs and VBOs automatically.
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*/
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class OPENGLSHARED_EXPORT OpenGLVertexArray {
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public:
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OpenGLVertexArray(bool has_uv, bool strip = false);
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~OpenGLVertexArray();
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inline int getVertexCount() const {
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return vertexcount;
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}
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/**
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* Release any allocated resource in the opengl context.
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*
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* Must be called in the opengl rendering thread, and before the destructor is called.
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*/
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void destroy(OpenGLFunctions *functions);
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/**
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* Render this array in current opengl context.
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*
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* Must be called in the opengl rendering thread.
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*
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* A shader program must be bound (and uniforms defined) when calling this.
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*/
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void render(OpenGLFunctions *functions, int start = 0, int count = -1);
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/**
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* Set the vertex total count.
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*/
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void setVertexCount(int count);
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/**
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* Set vertex data in the array.
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*
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* setVertexCount must have been called before to make room for this vertex.
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*/
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void set(int index, const Vector3 &location, double u = 0.0, double v = 0.0);
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/**
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* Retrieve vertex data in the array.
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*
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* This is not optimized, only use for testing.
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*/
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void get(int index, Vector3 *location, double *u, double *v) const;
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/**
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* Copy this vertex array to another.
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*
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* This does not check it the arrays have the same config, but they certainly should.
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*/
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void copyTo(OpenGLVertexArray *destination) const;
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private:
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/**
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* Update the opengl state.
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*
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* Should only be called when the data changed.
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*
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* Must be called in the opengl rendering thread.
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*/
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void update(OpenGLFunctions *functions);
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private:
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// Config
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bool has_uv;
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int draw_mode;
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// OpenGL IDs
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unsigned int vao;
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unsigned int vbo_vertex;
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unsigned int vbo_uv;
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// Data
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bool changed;
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int vertexcount;
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float *array_vertex;
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float *array_uv;
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};
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}
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}
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#endif // OPENGLVERTEXARRAY_H
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