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adjust demo and implementation to demonstrate proper camera movement

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Signed-off-by: Hartmut Seichter <hartmut@technotecture.com>
This commit is contained in:
Hartmut Seichter 2021-01-25 21:01:14 +01:00
parent 42c9fac38e
commit 2d8244386a
2 changed files with 13 additions and 2 deletions
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4
src/binding/src/script_core.cpp
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@ -56,6 +56,7 @@ void register_core_function(sol::state&,sol::table& ns)
, "column",&matrix4x4::column
, "set_identity",&matrix4x4::set_identity
, "inverse",&matrix4x4::inverse
, "identity", &matrix4x4::identity
);
ns.new_usertype<vector3>("vector3"
@ -72,6 +73,9 @@ void register_core_function(sol::state&,sol::table& ns)
,"right",&vector3::right
,"up",&vector3::up
,"down",&vector3::down
,sol::meta_function::addition,&vector3::operator+
,sol::meta_function::subtraction,&vector3::operator-
,sol::meta_function::multiplication,&vector3::operator*
);
ns.new_usertype<vector4>("vector4"

11
src/scripts/demos/simple_002.lua
View file

@ -70,6 +70,7 @@ s:set_source(pw.shader_type.fragment,[[
#version 400
uniform vec4 color = vec4(1.0, 0.0, 0.0, 1.0);
out vec4 frag_colour;
void main() {
frag_colour = color;
}
@ -91,6 +92,8 @@ end
-- camera position
local cam_pos = pw.vector3:new(0,0,0)
local model_pos = pw.vector3:new(0,0,0)
local ctx = pw.context:new()
@ -106,8 +109,8 @@ w.on_update = function(self)
-- set identity on model matrix
mm:set_identity()
-- set view matrix with look_at
mv = pw.matrixtransform.look_at(cam_pos,pw.vector3.forward(),pw.vector3.up())
-- set view matrix with look_at - view matrix is moving the world - hence inverse!
mv = pw.matrixtransform.look_at(cam_pos,cam_pos + pw.vector3.forward(),pw.vector3.up()):inverse()
-- compute aspect ratio from canvas size
aspect_ratio = self.client_size.width / self.client_size.height
@ -166,6 +169,10 @@ while w:update() do
cam_pos.x = cam_pos.x - move_step
elseif pw.input.get().input_string == 'd' then
cam_pos.x = cam_pos.x + move_step
elseif pw.input.get().input_string == 'z' then
cam_pos.y = cam_pos.y + move_step
elseif pw.input.get().input_string == 'x' then
cam_pos.y = cam_pos.y - move_step
end
print(cam_pos.x,cam_pos.y,cam_pos.z)