README.md

Session 8 - Camera, Skybox and water

Table of Contents

1. Camera and Skybox
2. Animated Water
3. Terran Texture
4. Multiple textures

Camera and Skybox

Keyboard and mouse controlled OpenGL camera can be used in this scene. The camera and skybox tutorials are in https://github.coventry.ac.uk/ac7020/212CR_TeachingMaterial/tree/master/Session%207

Animated Water

Animated water tutorial using a imported mesh can be found in

https://github.coventry.ac.uk/ac7020/212CR_TeachingMaterial/tree/master/Session%209

However, in this coursework, procedurally generated water is required. So, imported water mesh is not allowed.

To create a water mesh from scratch, we can use terrain mesh codes to create a flat large mesh object. Here is some example codes.

struct Vertex
{
	float coords[4];
	float colors[4];
};

const int MAP_SIZE = 33;  //define mesh size
static Vertex waterVertices[MAP_SIZE*MAP_SIZE] = {};

const int numStripsRequired = MAP_SIZE - 1;
const int verticesPerStrip = 2 * MAP_SIZE;
unsigned int waterIndexData[numStripsRequired][verticesPerStrip];

int i = 0;

	for (int z = 0; z < MAP_SIZE; z++)
	{
		for (int x = 0; x < MAP_SIZE; x++)
		{
			// y value is the height value (set to 0.0) // second part is color value
			waterVertices[i] = { { (float)x, 0.0, (float)z, 1.0 }, { 0.0, 0.0, 0.0, 1.0 } };
			i++;
		}
	}
	
	// Now build the index data
	i = 0;
	for (int z = 0; z < MAP_SIZE - 1; z++)
	{
		i = z * MAP_SIZE;
		for (int x = 0; x < MAP_SIZE * 2; x += 2)
		{
			waterIndexData[z][x] = i;
			i++;
		}
		for (int x = 1; x < MAP_SIZE * 2 + 1; x += 2)
		{
			waterIndexData[z][x] = i;
			i++;
		}
	}

Terran Texture

The instruction for lab task can be found in "Workshop 7 Instructions.pdf".

You need to add texture import codes in the C++ program. The texture tutorials can be found in https://github.coventry.ac.uk/ac7020/212CR_TeachingMaterial/tree/master/Session%204

You need to change fragment shader codes to include texture. For example

	fieldTexColor = texture(grassTex, texCoordsExport);
	//final color is combination of diffuse color and texture color
	colorsExport = fAndBDif*fieldTexColor;