40 lines
1.1 KiB
C++
40 lines
1.1 KiB
C++
#ifndef LLMR_GEOMETRY_LINE_BUFFER
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#define LLMR_GEOMETRY_LINE_BUFFER
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#include "buffer.hpp"
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namespace llmr {
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class LineVertexBuffer : public Buffer<
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8 // 2 coordinates per vertex + 1 linesofar + 1 extrude coord pair == 4 (== 8 bytes)
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> {
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public:
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typedef int16_t vertex_type;
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/*
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* Scale the extrusion vector so that the normal length is this value.
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* Contains the "texture" normals (-1..1). This is distinct from the extrude
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* normals for line joins, because the x-value remains 0 for the texture
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* normal array, while the extrude normal actually moves the vertex to create
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* the acute/bevelled line join.
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*/
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static const int8_t extrudeScale = 63;
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/*
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* Add a vertex to this buffer
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*
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* @param {number} x vertex position
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* @param {number} y vertex position
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* @param {number} ex extrude normal
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* @param {number} ey extrude normal
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* @param {number} tx texture normal
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* @param {number} ty texture normal
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*/
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size_t add(vertex_type x, vertex_type y, float ex, float ey, int8_t tx, int8_t ty, int32_t linesofar = 0);
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};
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}
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#endif
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