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Finished noiseTest example (in util.h) that uses Perlin noise to draw a bitmap in 2D.

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This commit is contained in:
Philip Rosedale 2013-05-07 11:14:12 -07:00
parent be1b803656
commit 331d4116d9
2 changed files with 5 additions and 4 deletions
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7
interface/src/Util.cpp
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@ -115,16 +115,17 @@ void drawVector(glm::vec3 * vector) {
// Render a 2D set of squares using perlin/fractal noise // Render a 2D set of squares using perlin/fractal noise
void noiseTest(int w, int h) { void noiseTest(int w, int h) {
const float CELLS = 100; const float CELLS = 500;
const float NOISE_SCALE = 10.0;
float xStep = (float) w / CELLS; float xStep = (float) w / CELLS;
float yStep = (float) h / CELLS; float yStep = (float) h / CELLS;
glBegin(GL_QUADS); glBegin(GL_QUADS);
for (float x = 0; x < (float)w; x += xStep) { for (float x = 0; x < (float)w; x += xStep) {
for (float y = 0; y < (float)h; y += yStep) { for (float y = 0; y < (float)h; y += yStep) {
// Generate a vector varying between 0-1 corresponding to the screen location // Generate a vector varying between 0-1 corresponding to the screen location
glm::vec2 position(x / (float) w, y / (float) h); glm::vec2 position(NOISE_SCALE * x / (float) w, NOISE_SCALE * y / (float) h);
// Set the cell color using the noise value at that location // Set the cell color using the noise value at that location
float color = glm::simplex(position); float color = glm::perlin(position);
glColor4f(color, color, color, 1.0); glColor4f(color, color, color, 1.0);
glVertex2f(x, y); glVertex2f(x, y);
glVertex2f(x + xStep, y); glVertex2f(x + xStep, y);

2
interface/src/main.cpp
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@ -893,7 +893,7 @@ void displayOverlay() {
audioScope.render(); audioScope.render();
#endif #endif
// noiseTest(WIDTH, HEIGHT); //noiseTest(WIDTH, HEIGHT);
if (displayHeadMouse && !::lookingInMirror && statsOn) { if (displayHeadMouse && !::lookingInMirror && statsOn) {
// Display small target box at center or head mouse target that can also be used to measure LOD // Display small target box at center or head mouse target that can also be used to measure LOD