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Improved parallax mapping. Generate heightmaps on the fly.

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This commit is contained in:
RealBadAngel 2015-06-14 21:13:36 +02:00
parent d105bf27dd
commit 43fcfbfe05
11 changed files with 310 additions and 241 deletions
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79
client/shaders/nodes_shader/opengl_vertex.glsl
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@ -14,25 +14,36 @@ varying vec3 eyeVec;
varying vec3 lightVec;
varying vec3 tsEyeVec;
varying vec3 tsLightVec;
varying float generate_heightmaps;
const float e = 2.718281828459;
const float BS = 10.0;
float smoothCurve( float x ) {
return x * x *( 3.0 - 2.0 * x );
float smoothCurve(float x)
{
return x * x * (3.0 - 2.0 * x);
}
float triangleWave( float x ) {
return abs( fract( x + 0.5 ) * 2.0 - 1.0 );
float triangleWave(float x)
{
return abs(fract(x + 0.5) * 2.0 - 1.0);
}
float smoothTriangleWave( float x ) {
return smoothCurve( triangleWave( x ) ) * 2.0 - 1.0;
float smoothTriangleWave(float x)
{
return smoothCurve(triangleWave(x)) * 2.0 - 1.0;
}
void main(void)
{
gl_TexCoord[0] = gl_MultiTexCoord0;
#if (MATERIAL_TYPE == TILE_MATERIAL_LIQUID_TRANSPARENT || MATERIAL_TYPE == TILE_MATERIAL_LIQUID_OPAQUE) && ENABLE_WAVING_WATER
gl_TexCoord[0].y += 0.008;
#if ((DRAW_TYPE == NDT_NORMAL || DRAW_TYPE == NDT_LIQUID || DRAW_TYPE == NDT_FLOWINGLIQUID) && GENERATE_NORMALMAPS)
generate_heightmaps = 1.0;
#else
generate_heightmaps = 0.0;
#endif
#if ((MATERIAL_TYPE == TILE_MATERIAL_LIQUID_TRANSPARENT || MATERIAL_TYPE == TILE_MATERIAL_LIQUID_OPAQUE) && ENABLE_WAVING_WATER)
vec4 pos = gl_Vertex;
pos.y -= 2.0;
@ -76,43 +87,33 @@ void main(void)
vPosition = gl_Position.xyz;
worldPosition = (mWorld * gl_Vertex).xyz;
// Don't generate heightmaps when too far from the eye
float dist = distance (worldPosition, eyePosition);
if (dist > 100.00) {
generate_heightmaps = 0.0;
}
vec3 sunPosition = vec3 (0.0, eyePosition.y * BS + 900.0, 0.0);
vec3 normal, tangent, binormal;
normal = normalize(gl_NormalMatrix * gl_Normal);
if (gl_Normal.x > 0.5) {
// 1.0, 0.0, 0.0
tangent = normalize(gl_NormalMatrix * vec3( 0.0, 0.0, -1.0));
binormal = normalize(gl_NormalMatrix * vec3( 0.0, -1.0, 0.0));
} else if (gl_Normal.x < -0.5) {
// -1.0, 0.0, 0.0
tangent = normalize(gl_NormalMatrix * vec3( 0.0, 0.0, 1.0));
binormal = normalize(gl_NormalMatrix * vec3( 0.0, -1.0, 0.0));
} else if (gl_Normal.y > 0.5) {
// 0.0, 1.0, 0.0
tangent = normalize(gl_NormalMatrix * vec3( 1.0, 0.0, 0.0));
binormal = normalize(gl_NormalMatrix * vec3( 0.0, 0.0, 1.0));
} else if (gl_Normal.y < -0.5) {
// 0.0, -1.0, 0.0
tangent = normalize(gl_NormalMatrix * vec3( 1.0, 0.0, 0.0));
binormal = normalize(gl_NormalMatrix * vec3( 0.0, 0.0, 1.0));
} else if (gl_Normal.z > 0.5) {
// 0.0, 0.0, 1.0
tangent = normalize(gl_NormalMatrix * vec3( 1.0, 0.0, 0.0));
binormal = normalize(gl_NormalMatrix * vec3( 0.0, -1.0, 0.0));
} else if (gl_Normal.z < -0.5) {
// 0.0, 0.0, -1.0
tangent = normalize(gl_NormalMatrix * vec3(-1.0, 0.0, 0.0));
binormal = normalize(gl_NormalMatrix * vec3( 0.0, -1.0, 0.0));
}
mat3 tbnMatrix = mat3( tangent.x, binormal.x, normal.x,
tangent.y, binormal.y, normal.y,
tangent.z, binormal.z, normal.z);
tangent = normalize(gl_NormalMatrix * gl_MultiTexCoord1.xyz);
binormal = normalize(gl_NormalMatrix * -gl_MultiTexCoord2.xyz);
vec3 v;
lightVec = sunPosition - worldPosition;
tsLightVec = lightVec * tbnMatrix;
eyeVec = (gl_ModelViewMatrix * gl_Vertex).xyz;
tsEyeVec = eyeVec * tbnMatrix;
v.x = dot(lightVec, tangent);
v.y = dot(lightVec, binormal);
v.z = dot(lightVec, normal);
tsLightVec = v;
eyeVec = -(gl_ModelViewMatrix * gl_Vertex).xyz;
v.x = dot(eyeVec, tangent);
v.y = dot(eyeVec, binormal);
v.z = dot(eyeVec, normal);
tsEyeVec = v;
vec4 color;
float day = gl_Color.r;