88 lines
2.6 KiB
C++
88 lines
2.6 KiB
C++
#include "SpectrumContext.h"
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#include "SpectrumCanvas.h"
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#include "CubicSDR.h"
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#include <sstream>
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#include <iostream>
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SpectrumContext::SpectrumContext(SpectrumCanvas *canvas, wxGLContext *sharedContext) :
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PrimaryGLContext(canvas, sharedContext), fft_size(0) {
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glDisable(GL_CULL_FACE);
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glDisable(GL_DEPTH_TEST);
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glMatrixMode(GL_PROJECTION);
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glLoadIdentity();
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}
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void SpectrumContext::Draw(std::vector<float> &points, long long freq, int bandwidth) {
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glDisable(GL_TEXTURE_2D);
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glColor3f(1.0, 1.0, 1.0);
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if (points.size()) {
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glPushMatrix();
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glTranslatef(-1.0f, -0.75f, 0.0f);
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glScalef(2.0f, 1.5f, 1.0f);
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glEnableClientState(GL_VERTEX_ARRAY);
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glVertexPointer(2, GL_FLOAT, 0, &points[0]);
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glDrawArrays(GL_LINE_STRIP, 0, points.size() / 2);
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glDisableClientState(GL_VERTEX_ARRAY);
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glPopMatrix();
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}
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GLint vp[4];
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glGetIntegerv( GL_VIEWPORT, vp);
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float viewHeight = (float) vp[3];
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float viewWidth = (float) vp[2];
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long long leftFreq = (float) freq - ((float) bandwidth / 2.0);
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long long rightFreq = leftFreq + (float) bandwidth;
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long long firstMhz = (leftFreq / 1000000) * 1000000;
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long double mhzStart = ((long double)(firstMhz - leftFreq) / (long double)(rightFreq - leftFreq)) * 2.0;
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long double mhzStep = (100000.0 / (long double)(rightFreq - leftFreq)) * 2.0;
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long double currentMhz = trunc(floor(firstMhz / 1000000.0));
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std::stringstream label;
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label.precision(2);
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float hPos = 1.0 - (16.0 / viewHeight);
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float lMhzPos = 1.0 - (5.0 / viewHeight);
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for (float m = -1.0 + mhzStart, mMax = 1.0 + fabs(mhzStart); m <= mMax; m += mhzStep) {
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label << std::fixed << currentMhz;
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double fractpart, intpart;
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fractpart = modf(currentMhz, &intpart);
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if (fractpart < 0.001) {
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glLineWidth(4.0);
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glColor3f(1.0, 1.0, 1.0);
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} else {
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glLineWidth(1.0);
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glColor3f(0.55, 0.55, 0.55);
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}
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glDisable(GL_TEXTURE_2D);
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glBegin(GL_LINES);
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glVertex2f(m, lMhzPos);
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glVertex2f(m, 1);
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glEnd();
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getFont(PrimaryGLContext::GLFONT_SIZE12).drawString(label.str(), m, hPos, 12, GLFont::GLFONT_ALIGN_CENTER, GLFont::GLFONT_ALIGN_CENTER);
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label.str(std::string());
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currentMhz += 0.1f;
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}
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glLineWidth(1.0);
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// getFont(PrimaryGLContext::GLFONT_SIZE16).drawString("Welcome to CubicSDR -- This is a test string. 01234567890!@#$%^&*()_[]",0.0,0.0,16,GLFont::GLFONT_ALIGN_CENTER,GLFont::GLFONT_ALIGN_CENTER);
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CheckGLError();
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}
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