source: GTP/trunk/App/Demos/Vis/FriendlyCulling/src/PerformanceGraph.cpp @ 2829

Revision 2829, 2.4 KB checked in by mattausch, 16 years ago (diff)

worked on environment + hud

Line 
1#include "PerformanceGraph.h"
2#include "glInterface.h"
3
4
5PerformanceGraph::PerformanceGraph(int maxData):
6mMaxData(maxData), mCurrentIdx(0)
7{
8        mGraphColor[0] = 1.0f;
9        mGraphColor[1] = 0.0f;
10        mGraphColor[2] = 0.0f;
11}
12
13       
14void PerformanceGraph::DrawBackGround()
15{
16        glEnable(GL_BLEND);
17        glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
18
19        glColor4f(0.0f, 0.0f, 0.0f, 0.5f);
20
21        // show a grid
22        glBegin(GL_QUADS);
23        glVertex3f(0, 0, 0.0f);
24        glVertex3f(1, 0, 0.0f);
25        glVertex3f(1, 1, 0.0f);
26        glVertex3f(0, 1, 0.0f);
27        glEnd();
28
29        glDisable(GL_BLEND);
30}
31
32
33void PerformanceGraph::DrawGrid()
34{
35        glColor4f(0.0f, 1.0f, 0.0f, 1.0f);
36
37        // show a grid
38        glBegin(GL_LINE_LOOP);
39        glVertex3f(0, 0, 0.0f);
40        glVertex3f(1, 0, 0.0f);
41        glVertex3f(1, 1, 0.0f);
42        glVertex3f(0, 1, 0.0f);
43        glEnd();
44}
45
46
47void PerformanceGraph::Draw()
48{
49        glPushAttrib(GL_ALL_ATTRIB_BITS);
50
51        glLineWidth(2);
52        glDisable(GL_DEPTH_TEST);
53        //glDepthMask(true);
54
55        glDisable(GL_LIGHTING);
56        glDisable(GL_TEXTURE_2D);
57
58        // init ortographic projection
59        glMatrixMode(GL_PROJECTION);
60        glPushMatrix();
61        glLoadIdentity();
62
63        gluOrtho2D(0, 1.0f, 0, 1.0f);
64
65        glMatrixMode(GL_MODELVIEW);
66        glPushMatrix();
67        glLoadIdentity();
68       
69        glTranslatef(0.668f, 0.668f, 0.0f);
70        glScalef(0.33f, 0.33f, 1.0f);
71
72        DrawBackGround();
73        DrawCurve();
74        DrawGrid();
75
76        glPopMatrix();
77       
78        // restore the projection matrix
79        glMatrixMode(GL_PROJECTION);
80        glPopMatrix();
81
82        glMatrixMode(GL_MODELVIEW);
83
84        glPopAttrib();
85}
86
87
88void PerformanceGraph::DrawCurve()
89{
90        const float scalex = 1.0f / mMaxData;
91        const float scaley = 1.0f / 50.0f;
92
93        glColor3fv(mGraphColor);
94
95        glBegin(GL_LINE_STRIP);
96
97        for (size_t i = 0; i < mData.size(); ++ i)
98        {
99                const float x = i * scalex;
100                const float y = mData[i] * scaley;
101
102                glVertex3f(x, y, 0.0f);
103        }
104
105        glEnd();
106
107        // show a grid
108        glBegin(GL_LINES);
109        glVertex3f(mCurrentIdx * scalex, 0, 0.0f);
110        glVertex3f(mCurrentIdx * scalex, 1, 0.0f);
111        glEnd();
112}
113
114
115void PerformanceGraph::AddData(float data)
116{
117        if ((int)mData.size() < mMaxData)
118                mData.push_back(data);
119        else
120                mData[mCurrentIdx]= data;
121
122        mCurrentIdx = (mCurrentIdx + 1) % mMaxData;
123}
124
125
126void PerformanceGraph::Reset()
127{
128        mCurrentIdx = 0;
129        mData.clear();
130}
131
132
133void PerformanceGraph::SetGraphColor(float *col)
134{
135        mGraphColor[0] = col[0];
136        mGraphColor[1] = col[1];
137        mGraphColor[2] = col[2];
138}
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