[2827] | 1 | #include "PerformanceGraph.h"
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| 2 | #include "glInterface.h"
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| 3 |
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| 4 |
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| 5 | PerformanceGraph::PerformanceGraph(int maxData):
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| 6 | mMaxData(maxData), mCurrentIdx(0)
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| 7 | {
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[2828] | 8 | mGraphColor[0] = 1.0f;
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| 9 | mGraphColor[1] = 0.0f;
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| 10 | mGraphColor[2] = 0.0f;
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[2827] | 11 | }
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| 12 |
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| 13 |
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| 14 | void PerformanceGraph::DrawBackGround()
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| 15 | {
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| 16 | glEnable(GL_BLEND);
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| 17 | glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
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| 18 |
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| 19 | glColor4f(0.0f, 0.0f, 0.0f, 0.5f);
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| 20 |
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| 21 | // show a grid
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| 22 | glBegin(GL_QUADS);
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| 23 | glVertex3f(0, 0, 0.0f);
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| 24 | glVertex3f(1, 0, 0.0f);
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| 25 | glVertex3f(1, 1, 0.0f);
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| 26 | glVertex3f(0, 1, 0.0f);
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| 27 | glEnd();
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| 28 |
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| 29 | glDisable(GL_BLEND);
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| 30 | }
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| 31 |
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| 32 |
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| 33 | void PerformanceGraph::DrawGrid()
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| 34 | {
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| 35 | glColor4f(0.0f, 1.0f, 0.0f, 1.0f);
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| 36 |
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| 37 | // show a grid
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| 38 | glBegin(GL_LINE_LOOP);
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| 39 | glVertex3f(0, 0, 0.0f);
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| 40 | glVertex3f(1, 0, 0.0f);
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| 41 | glVertex3f(1, 1, 0.0f);
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| 42 | glVertex3f(0, 1, 0.0f);
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| 43 | glEnd();
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| 44 | }
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| 45 |
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| 46 |
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| 47 | void PerformanceGraph::Draw()
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| 48 | {
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| 49 | glPushAttrib(GL_ALL_ATTRIB_BITS);
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| 50 |
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| 51 | glLineWidth(2);
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| 52 | glDisable(GL_DEPTH_TEST);
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| 53 |
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| 54 | glDisable(GL_LIGHTING);
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| 55 | glDisable(GL_TEXTURE_2D);
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| 56 |
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| 57 | // init ortographic projection
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| 58 | glMatrixMode(GL_PROJECTION);
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| 59 | glPushMatrix();
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| 60 | glLoadIdentity();
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| 61 |
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| 62 | gluOrtho2D(0, 1.0f, 0, 1.0f);
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| 63 |
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| 64 | glMatrixMode(GL_MODELVIEW);
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| 65 | glPushMatrix();
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| 66 | glLoadIdentity();
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| 67 |
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[2829] | 68 | glTranslatef(0.668f, 0.668f, 0.0f);
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| 69 | glScalef(0.33f, 0.33f, 1.0f);
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[2827] | 70 |
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| 71 | DrawBackGround();
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| 72 | DrawCurve();
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| 73 | DrawGrid();
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| 74 |
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| 75 | // restore the projection matrix
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| 76 | glMatrixMode(GL_PROJECTION);
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| 77 | glPopMatrix();
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| 78 |
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| 79 | glMatrixMode(GL_MODELVIEW);
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[2834] | 80 | glPopMatrix();
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[2827] | 81 |
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| 82 | glPopAttrib();
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| 83 | }
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| 84 |
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| 85 |
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| 86 | void PerformanceGraph::DrawCurve()
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| 87 | {
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| 88 | const float scalex = 1.0f / mMaxData;
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| 89 | const float scaley = 1.0f / 50.0f;
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| 90 |
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[2828] | 91 | glColor3fv(mGraphColor);
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[2827] | 92 |
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| 93 | glBegin(GL_LINE_STRIP);
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| 94 |
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| 95 | for (size_t i = 0; i < mData.size(); ++ i)
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| 96 | {
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| 97 | const float x = i * scalex;
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| 98 | const float y = mData[i] * scaley;
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| 99 |
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| 100 | glVertex3f(x, y, 0.0f);
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| 101 | }
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| 102 |
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| 103 | glEnd();
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| 104 |
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| 105 | // show a grid
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| 106 | glBegin(GL_LINES);
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| 107 | glVertex3f(mCurrentIdx * scalex, 0, 0.0f);
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| 108 | glVertex3f(mCurrentIdx * scalex, 1, 0.0f);
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| 109 | glEnd();
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| 110 | }
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| 111 |
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| 112 |
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| 113 | void PerformanceGraph::AddData(float data)
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| 114 | {
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| 115 | if ((int)mData.size() < mMaxData)
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| 116 | mData.push_back(data);
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| 117 | else
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| 118 | mData[mCurrentIdx]= data;
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| 119 |
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| 120 | mCurrentIdx = (mCurrentIdx + 1) % mMaxData;
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| 121 | }
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| 122 |
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| 123 |
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| 124 | void PerformanceGraph::Reset()
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| 125 | {
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| 126 | mCurrentIdx = 0;
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| 127 | mData.clear();
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[2828] | 128 | }
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| 129 |
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| 130 |
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| 131 | void PerformanceGraph::SetGraphColor(float *col)
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| 132 | {
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| 133 | mGraphColor[0] = col[0];
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| 134 | mGraphColor[1] = col[1];
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| 135 | mGraphColor[2] = col[2];
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[2827] | 136 | } |
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