70 lines
2.0 KiB
C++
70 lines
2.0 KiB
C++
/****************************************************************************
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* Copyright (C) 2010
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* by Dimok
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*
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* This software is provided 'as-is', without any express or implied
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* warranty. In no event will the authors be held liable for any
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* damages arising from the use of this software.
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*
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* Permission is granted to anyone to use this software for any
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* purpose, including commercial applications, and to alter it and
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* redistribute it freely, subject to the following restrictions:
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*
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* 1. The origin of this software must not be misrepresented; you
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* must not claim that you wrote the original software. If you use
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* this software in a product, an acknowledgment in the product
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* documentation would be appreciated but is not required.
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*
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* 2. Altered source versions must be plainly marked as such, and
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* must not be misrepresented as being the original software.
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*
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* 3. This notice may not be removed or altered from any source
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* distribution.
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***************************************************************************/
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#include "gui_circle.hpp"
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GuiCircle::GuiCircle()
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: radius(100.0f), filled(true), accuracy(36)
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{
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color = (GXColor) {0, 0, 0, 255};
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SetLinewidth(1.0f);
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}
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GuiCircle::GuiCircle(float r)
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: radius(r), filled(true), accuracy(36)
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{
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color = (GXColor) {0, 0, 0, 255};
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SetLinewidth(1.0f);
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}
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void GuiCircle::SetLinewidth(float s)
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{
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LOCK(this);
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Linewidth = s;
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GX_SetLineWidth((u8) (s*6.0f), 0);
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}
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void GuiCircle::Draw()
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{
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GX_SetTevOp(GX_TEVSTAGE0, GX_PASSCLR);
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GX_SetVtxDesc(GX_VA_POS, GX_DIRECT);
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GX_SetVtxDesc(GX_VA_CLR0, GX_DIRECT);
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GX_SetVtxDesc(GX_VA_TEX0, GX_NONE);
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int loopAmount = filled ? accuracy : accuracy+1;
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GX_Begin(filled ? GX_TRIANGLEFAN : GX_LINESTRIP, GX_VTXFMT0, loopAmount);
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for(int i = 0; i < loopAmount; ++i)
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{
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f32 rad = (f32) i / (f32) accuracy * 360.0f;
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f32 x = cos(DegToRad(rad)) * radius + GetLeft();
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f32 y = sin(DegToRad(rad)) * radius + GetTop();
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GX_Position3f32(x, y, 0.0f);
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GX_Color4u8(color.r, color.g, color.b, color.a);
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}
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GX_End();
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GX_SetTevOp(GX_TEVSTAGE0, GX_MODULATE);
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}
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