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Add heightmap and apply it in tessellation shader

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This commit is contained in:
karl 2021-05-30 20:33:10 +02:00
parent 41154580f2
commit 4cf0dc230b
5 changed files with 23 additions and 15 deletions
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6
Shader/terrain.fs
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@ -5,11 +5,11 @@ in PipelineData {
vec2 texture_coordinate;
} fs_in;
uniform sampler2D diffuse_texture;
layout (binding = 0) uniform sampler2D heightmap;
out vec4 color;
void main() {
vec4 diffuse_texel = texture(diffuse_texture, fs_in.texture_coordinate);
color = vec4(1.0); // color = vec4(diffuse_texel);
vec4 diffuse_texel = texture(heightmap, fs_in.texture_coordinate);
color = vec4(diffuse_texel);
}

8
Shader/terrain.tcs
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@ -16,8 +16,8 @@ void main() {
tc_out[gl_InvocationID].texture_coordinate = tc_in[gl_InvocationID].texture_coordinate;
tc_out[gl_InvocationID].position = tc_in[gl_InvocationID].position;
gl_TessLevelInner[0] = 12;
gl_TessLevelOuter[0] = 12;
gl_TessLevelOuter[1] = 12;
gl_TessLevelOuter[2] = 12;
gl_TessLevelInner[0] = 32;
gl_TessLevelOuter[0] = 32;
gl_TessLevelOuter[1] = 32;
gl_TessLevelOuter[2] = 32;
}

11
Shader/terrain.tes
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@ -2,6 +2,12 @@
layout(triangles) in;
layout (binding = 0) uniform sampler2D heightmap;
uniform mat4 model;
uniform mat4 projection;
uniform mat4 view;
in PipelineData {
vec4 position;
vec2 texture_coordinate;
@ -21,5 +27,8 @@ void main() {
te_out.position += gl_TessCoord.y * te_in[1].position;
te_out.position += gl_TessCoord.z * te_in[2].position;
gl_Position = te_out.position;
te_out.position.y += texture(heightmap, te_out.texture_coordinate).r;
mat4 pvm = projection * view * model;
gl_Position = pvm * te_out.position;
}

7
Shader/terrain.vs
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@ -6,20 +6,15 @@ layout (location = 2) in vec2 texture_coordinate;
layout (location = 3) in vec3 aTangent;
layout (location = 4) in vec3 aBitangent;
uniform mat4 model;
uniform mat4 projection;
uniform mat4 view;
out PipelineData {
vec4 position;
vec2 texture_coordinate;
} vs_out;
void main() {
mat4 pvm = projection * view * model;
vs_out.texture_coordinate = texture_coordinate;
vec4 homogenous_position = vec4(position, 1.0);
vs_out.position = pvm * homogenous_position;
vs_out.position = homogenous_position;
gl_Position = vs_out.position;
}

6
test/full-demo/main.cpp
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@ -26,7 +26,8 @@ class FullDemo : public Gedeng::Application {
particle_tex1("Resources/Textures/Particles/circle.png", Gedeng::Texture::Settings()),
particle_tex2("Resources/Textures/Particles/magic.png", Gedeng::Texture::Settings()),
particle_tex3("Resources/Textures/Particles/smoke.png", Gedeng::Texture::Settings()),
quad_mesh(Gedeng::QuadMesh(10.0)), light(glm::vec3(0.57735, -0.57735, 0.57735)),
heightmap("Resources/Textures/terrain.png", Gedeng::Texture::Settings()), quad_mesh(Gedeng::QuadMesh(10.0)),
light(glm::vec3(0.57735, -0.57735, 0.57735)),
mesh1("Resources/Meshes/Monkey.obj", Gedeng::ObjMesh::Settings()),
mesh2("Resources/Meshes/bench.obj", Gedeng::ObjMesh::Settings()),
mesh3("Resources/Meshes/ring.obj", Gedeng::ObjMesh::Settings()) {
@ -126,6 +127,7 @@ class FullDemo : public Gedeng::Application {
// Terrain
terrain_shader.use();
heightmap.bind_to(0);
terrain_shader.setMat4("projection", camera.get_projection());
terrain_shader.setMat4("view", camera.get_view());
terrain_mesh.render_patches(terrain_shader);
@ -157,6 +159,8 @@ class FullDemo : public Gedeng::Application {
Gedeng::Texture particle_tex2;
Gedeng::Texture particle_tex3;
Gedeng::Texture heightmap;
Gedeng::QuadMesh quad_mesh;
Gedeng::QuadMesh terrain_mesh;