Added heightmap loading

OpenGL4/HeightMap.cpp

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