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The parallax matching issue in GLSL, Opengl

Displaying My Parallax gives incorrect results. I do not know what might be wrong.

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The "shadow" is in the wrong place.

The light points to the viewer and goes to the cube. Shader program (based on dhpoware.com):

[vert] varying vec3 lightDir; varying vec3 viewDir; attribute vec4 tangent; void main() { gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex; gl_TexCoord[0] = gl_MultiTexCoord0; vec3 vertexPos = vec3(gl_ModelViewMatrix * gl_Vertex); vec3 n = normalize(gl_NormalMatrix * gl_Normal); vec3 t = normalize(gl_NormalMatrix * tangent.xyz); vec3 b = cross(n, t) * tangent.w; mat3 tbnMatrix = mat3(tx, bx, nx, ty, by, ny, tz, bz, nz); lightDir = (gl_LightSource[0].position.xyz - vertexPos) / 1000.0; lightDir = tbnMatrix * lightDir; viewDir = -vertexPos; viewDir = tbnMatrix * viewDir; } [frag] varying vec3 lightDir; varying vec3 viewDir; uniform sampler2D diffuseMap; uniform sampler2D normalMap; uniform sampler2D heightMap; uniform float scale; uniform float bias; void main() { vec3 v = normalize(viewDir); vec2 TexCoord = gl_TexCoord[0].st; { float height = texture2D(heightMap, gl_TexCoord[0].st).r; height = height * scale + bias; TexCoord = gl_TexCoord[0].st + (height * v.xy); } vec3 l = lightDir; float atten = max(0.0, 1.0 - dot(l, l)); l = normalize(l); vec3 n = normalize(texture2D(normalMap, TexCoord).rgb * 2.0 - 1.0); vec3 h = normalize(l + v); float nDotL = max(0.0, dot(n, l)); float nDotH = max(0.0, dot(n, h)); float power = (nDotL == 0.0) ? 0.0 : pow(nDotH, gl_FrontMaterial.shininess); vec4 ambient = gl_FrontLightProduct[0].ambient * atten; vec4 diffuse = gl_FrontLightProduct[0].diffuse * nDotL * atten; vec4 specular = gl_FrontLightProduct[0].specular * power * atten; vec4 color = gl_FrontLightModelProduct.sceneColor + ambient + diffuse + specular;color *= texture2D(diffuseMap,TexCoord); gl_FragColor = color ; }

log from the contents of the cube (including tangents, the fourth component is manualness):

 ------------------------------------------------------------------------------------------------------------------ VecContainer<Vertex> vertices = size: 36 space: 36 { -4.000000, -4.000000, -4.000000, -4.000000, 4.000000, -4.000000, 4.000000, 4.000000, -4.000000, 4.000000, 4.000000, -4.000000, 4.000000, -4.000000, -4.000000, -4.000000, -4.000000, -4.000000, -4.000000, -4.000000, -4.000000, 4.000000, -4.000000, -4.000000, 4.000000, -4.000000, 4.000000, 4.000000, -4.000000, 4.000000, -4.000000, -4.000000, 4.000000, -4.000000, -4.000000, -4.000000, -4.000000, -4.000000, -4.000000, -4.000000, -4.000000, 4.000000, -4.000000, 4.000000, 4.000000, -4.000000, 4.000000, 4.000000, -4.000000, 4.000000, -4.000000, -4.000000, -4.000000, -4.000000, 4.000000, -4.000000, -4.000000, 4.000000, 4.000000, -4.000000, 4.000000, 4.000000, 4.000000, 4.000000, 4.000000, 4.000000, 4.000000, -4.000000, 4.000000, 4.000000, -4.000000, -4.000000, -4.000000, 4.000000, -4.000000, -4.000000, 4.000000, 4.000000, 4.000000, 4.000000, 4.000000, 4.000000, 4.000000, 4.000000, 4.000000, 4.000000, -4.000000, -4.000000, 4.000000, -4.000000, -4.000000, -4.000000, 4.000000, 4.000000, -4.000000, 4.000000, 4.000000, 4.000000, 4.000000, 4.000000, 4.000000, 4.000000, -4.000000, 4.000000, 4.000000, -4.000000, -4.000000, 4.000000, } ------------------------------------------------------------------------------------------------------------------ VecContainer<Vertex> texcoords = size: 36 space: 36 { 0.000000, 0.000000, 0.000000, 1.000000, 1.000000, 1.000000, 1.000000, 1.000000, 1.000000, 0.000000, 0.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 1.000000, 1.000000, 1.000000, 1.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 1.000000, 1.000000, 1.000000, 1.000000, 0.000000, 1.000000, 0.000000, 0.000000, 1.000000, 0.000000, 1.000000, 1.000000, 0.000000, 1.000000, 0.000000, 1.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 1.000000, 0.000000, 1.000000, 0.000000, 1.000000, 1.000000, 0.000000, 1.000000, 0.000000, 0.000000, 1.000000, 0.000000, 1.000000, 1.000000, 1.000000, 1.000000, 0.000000, 1.000000, 0.000000, 0.000000, } ------------------------------------------------------------------------------------------------------------------ VecContainer<Vertex> normals = size: 36 space: 36 { 0.000000, 0.000000, -1.000000, 0.000000, 0.000000, -1.000000, 0.000000, 0.000000, -1.000000, 0.000000, 0.000000, -1.000000, 0.000000, 0.000000, -1.000000, 0.000000, 0.000000, -1.000000, 0.000000, -1.000000, 0.000000, 0.000000, -1.000000, 0.000000, 0.000000, -1.000000, 0.000000, 0.000000, -1.000000, 0.000000, 0.000000, -1.000000, 0.000000, 0.000000, -1.000000, 0.000000, -1.000000, 0.000000, 0.000000, -1.000000, 0.000000, 0.000000, -1.000000, 0.000000, 0.000000, -1.000000, 0.000000, 0.000000, -1.000000, 0.000000, 0.000000, -1.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 1.000000, } ------------------------------------------------------------------------------------------------------------------ VecContainer<tangent>* tangents = size: 36 space: 36 { 1.000000, -0.000000, 0.000000, 1.000000, 1.000000, -0.000000, 0.000000, 1.000000, 1.000000, -0.000000, 0.000000, 1.000000, 1.000000, -0.000000, 0.000000, 1.000000, 1.000000, -0.000000, 0.000000, 1.000000, 1.000000, -0.000000, 0.000000, 1.000000, 1.000000, 0.000000, 0.000000, -1.000000, 1.000000, 0.000000, 0.000000, -1.000000, 1.000000, 0.000000, 0.000000, -1.000000, 1.000000, 0.000000, 0.000000, -1.000000, 1.000000, 0.000000, 0.000000, -1.000000, 1.000000, 0.000000, 0.000000, -1.000000, 0.000000, 0.000000, 1.000000, -1.000000, 0.000000, 0.000000, 1.000000, -1.000000, 0.000000, 0.000000, 1.000000, -1.000000, 0.000000, 0.000000, 1.000000, -1.000000, 0.000000, 0.000000, 1.000000, -1.000000, 0.000000, 0.000000, 1.000000, -1.000000, 0.000000, 0.000000, -1.000000, -1.000000, 0.000000, 0.000000, -1.000000, -1.000000, 0.000000, 0.000000, -1.000000, -1.000000, 0.000000, 0.000000, -1.000000, -1.000000, 0.000000, 0.000000, -1.000000, -1.000000, 0.000000, 0.000000, -1.000000, -1.000000, 1.000000, 0.000000, 0.000000, -1.000000, 1.000000, 0.000000, 0.000000, -1.000000, 1.000000, 0.000000, 0.000000, -1.000000, 1.000000, 0.000000, 0.000000, -1.000000, 1.000000, 0.000000, 0.000000, -1.000000, 1.000000, 0.000000, 0.000000, -1.000000, 1.000000, 0.000000, 0.000000, -1.000000, 1.000000, 0.000000, 0.000000, -1.000000, 1.000000, 0.000000, 0.000000, -1.000000, 1.000000, 0.000000, -0.000000, -1.000000, 1.000000, 0.000000, -0.000000, -1.000000, 1.000000, 0.000000, -0.000000, -1.000000 } ------------------------------------------------------------------------------------------------------------------ VecContainer<GLuint> indices = size: 12 space: 12 { 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 0, 1, 2 }

What can cause this problem?

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1 answer

As in the previous question, I think that you still have the same problem. Did you forget the minus somewhere, or perhaps cross-cross in the wrong order.

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Source: https://habr.com/ru/post/1336355/

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