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PngExporter.cpp
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/
PngExporter.cpp
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#include "PngExporter.h"
#include "gTools.h"
#include <stdio.h>
#include <Math.h>
#include "lodepng.h"
int PngExporter::writeGridToPng(const char* fileName, Grid<Vec3>& grid, int exportType) {
float minX = FLT_MAX;
float minY = FLT_MAX;
float minZ = FLT_MAX;
float maxX = FLT_MIN;
float maxY = FLT_MIN;
float maxZ = FLT_MIN;
for (int i = 0; i < grid.w*grid.h; i++) {
const Vec3& v = grid.data[i];
minX = gmin(minX, v.x);
minY = gmin(minY, v.y);
minZ = gmin(minZ, v.z);
maxX = gmin(maxX, v.x);
maxY = gmin(maxY, v.y);
maxZ = gmin(maxZ, v.z);
}
int t = 0;
byte* image = new byte[grid.w*grid.h * 4];
byte* c = image;
for (int i = 0; i < grid.w; i++) {
for (int j = 0; j < grid.h; j++) {
byte r, g, b, a;
a = 0xFF;
switch (exportType) {
case ExportTypeVec3XOnly:
r = g = b = (byte)(255 * ((grid[i][j].x - minX) / (maxX - minX)));
break;
case ExportTypeVec3YOnly:
r = g = b = (byte)(255 * ((grid[i][j].y - minY) / (maxY - minY)));
break;
case ExportTypeVec3ZOnly:
r = g = b = (byte)(255 * ((grid[i][j].z - minZ) / (maxZ - minZ)));
break;
case ExportTypeVec3AsColor:
r = (byte)(255 * grid[i][j].x);
g = (byte)(255 * grid[i][j].y);
b = (byte)(255 * grid[i][j].z);
break;
default:
r = (byte)(255 * ((grid[i][j].x - minX) / (maxX - minX)));
g = (byte)(255 * ((grid[i][j].y - minY) / (maxY - minY)));
b = (byte)(255 * ((grid[i][j].z - minZ) / (maxZ - minZ)));
break;
}
*c++ = r;
*c++ = g;
*c++ = b;
*c++ = a;
}
}
unsigned error = lodepng_encode32_file(fileName, image, grid.w, grid.h);
delete image;
/*if there's an error, display it*/
if (error) printf("error %u: %s\n", error, lodepng_error_text(error));
return error;
}
int PngExporter::writeGridToPng(const char* fileName, Grid<float>& grid, const Vec3& minColor, const Vec3& maxColor) {
float min = FLT_MAX;
float max = FLT_MIN;
for (int i = 0; i < grid.w*grid.h; i++) {
float v = grid.data[i];
min = gmin(min, v);
max = gmax(max, v);
}
byte* image = new byte[grid.w*grid.h * 4];
byte* c = image;
for (int i = 0; i < grid.w; i++) {
for (int j = 0; j < grid.h; j++) {
byte r, g, b, a;
float t = (grid[i][j] - min) / (max - min);
Vec3 color = lerpVec(minColor, maxColor, t);
r = (int)(color.r * 0xFF);
g = (int)(color.g * 0xFF);
b = (int)(color.b * 0xFF);
a = 0xFF;
*c++ = r;
*c++ = g;
*c++ = b;
*c++ = a;
}
}
unsigned error = lodepng_encode32_file(fileName, image, grid.w, grid.h);
delete image;
/*if there's an error, display it*/
if (error) printf("error %u: %s\n", error, lodepng_error_text(error));
return error;
}
int PngExporter::writeGridToPng(const char* fileName, PerlinMap perlin, int nodeCount, const Vec3& minColor, const Vec3& maxColor) {
float min = FLT_MAX;
float max = FLT_MIN;
for (int i = 0; i < nodeCount; i++) {
for (int j = 0; j < nodeCount; j++) {
float v = perlin.getHeightAt(WorldCoor(i, j));
min = gmin(min, v);
max = gmax(max, v);
}
}
byte* image = new byte[nodeCount * nodeCount * 4];
byte* c = image;
for (int i = 0; i < nodeCount; i++) {
for (int j = 0; j < nodeCount; j++) {
float v = perlin.getHeightAt(WorldCoor(i, j));
byte r, g, b, a;
float t = (v - min) / (max - min);
Vec3 color = lerpVec(minColor, maxColor, t);
r = (int)(color.r * 0xFF);
g = (int)(color.g * 0xFF);
b = (int)(color.b * 0xFF);
a = 0xFF;
*c++ = r;
*c++ = g;
*c++ = b;
*c++ = a;
}
}
unsigned error = lodepng_encode32_file(fileName, image, nodeCount, nodeCount);
delete image;
/*if there's an error, display it*/
if (error) printf("error %u: %s\n", error, lodepng_error_text(error));
return error;
}