65 lines
2.1 KiB
Plaintext
65 lines
2.1 KiB
Plaintext
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// newton fractal globals
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PShader nf_myShader;
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float nf_previousTime = 0.0;
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boolean nf_mouseDragged = false;
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PVector nf_lastMousePosition;
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float nf_mouseClickState = 0.0;
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void setup_newton_fractal()
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{
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// Load the shader file from the "data" folder
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nf_myShader = loadShader("defaultShader.cpp");
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// We assume the dimension of the window will not change over time,
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// therefore we can pass its values in the setup() function
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nf_myShader.set("iResolution", float(width), float(height), 0.0);
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nf_lastMousePosition = new PVector(float(mouseX),float(mouseY));
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// needed cuz noFill means no shader
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fill(255);
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noStroke();
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}
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void draw_newton_fractal()
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{
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// shader playback time (in seconds)
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float currentTime = millis()/1000.0 - myTime;
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nf_myShader.set("iTime", currentTime);
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// render time (in seconds)
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float timeDelta = currentTime - nf_previousTime;
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nf_previousTime = currentTime;
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nf_myShader.set("iDeltaTime", timeDelta);
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// shader playback frame
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nf_myShader.set("iFrame", frameCount);
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// mouse pixel coords. xy: current (if MLB down), zw: click
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if(mousePressed) {
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nf_lastMousePosition.set(float(mouseX),float(mouseY));
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nf_mouseClickState = 1.0;
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} else {
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nf_mouseClickState = 0.0;
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}
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nf_myShader.set( "iMouse", nf_lastMousePosition.x, nf_lastMousePosition.y, nf_mouseClickState, nf_mouseClickState);
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// Set the date
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// Note that iDate.y and iDate.z contain month-1 and day-1 respectively,
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// while x does contain the year (see: https://www.shadertoy.com/view/ldKGRR)
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float timeInSeconds = hour()*3600 + minute()*60 + second();
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nf_myShader.set("iDate", year(), month()-1, day()-1, timeInSeconds );
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// This uniform is undocumented so I have no idea what the range is
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nf_myShader.set("iFrameRate", frameRate);
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// Apply the specified shader to any geometry drawn from this point
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shader(nf_myShader);
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// Draw the output of the shader onto a rectangle that covers the whole viewport.
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fill(255);
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rect(0, 0, width, height);
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resetShader();
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}
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