51 lines
1.3 KiB
C++
51 lines
1.3 KiB
C++
#include "HeightMap.h"
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#include "stb_image.h"
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#include <GL/freeglut.h>
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#include <iostream>
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#include <string>
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HeightMap::HeightMap(const std::string &file)
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{
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int bpp;
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unsigned char* imgData = stbi_load(file.c_str(), &width, &height, &bpp, 4);
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for (int h = 0; h < height; h++)
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{
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for (int w = 0; w < width; w++)
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{
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int offsets[4][2] = { { 0, 0 },{ 1, 0 },{ 1, 1 },{ 0, 1 } };
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for (int i = 0; i < 4; i++)
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{
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float height = ((float)imgData[((h + offsets[i][0]) + (w + offsets[i][1]) * width) * 4]);
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height = (height / 256.0f) * 100.0f;
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vertices.push_back(Vertex{ (float)(h + offsets[i][0]), height, (float)(w + offsets[i][1]),
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0, 1, 0,
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h*0.1f, (w*0.f) + offsets[i][1] });
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}
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}
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}
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stbi_image_free(imgData);
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}
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HeightMap::~HeightMap()
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{
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}
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void HeightMap::Draw()
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{
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glEnableClientState(GL_VERTEX_ARRAY);
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//glEnableClientState(GL_COLOR_ARRAY);
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//glEnableClientState(GL_NORMAL_ARRAY);
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glVertexPointer(3, GL_FLOAT, sizeof(Vertex), ((float*)vertices.data()) + 0);
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//glNormalPointer(GL_FLOAT, sizeof(Vertex), ((float*)cubeVertices.data()) + 3);
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//glColorPointer(4, GL_FLOAT, sizeof(Vertex), ((float*)cubeVertices.data()) + 6);
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glDrawArrays(GL_QUADS, 0, vertices.size());
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glDisableClientState(GL_VERTEX_ARRAY);
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//glDisableClientState(GL_COLOR_ARRAY);
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//glDisableClientState(GL_NORMAL_ARRAY);
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} |